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AECL / KAERI PROPRIETARY

Proj. SI Sar.

T.D.S.

Branch/Sarv. RC/CD Data

9540 0000 999 91-10-28

~-Korea [

Technical

Multipurpose

,Research

Specification

Reactor

Fabrication of

S utoff Units

Phase III

PREPARED BY: D. Giles

Z. Klobucar

- Quality As81lrllnCe

AT .-£€ v. o. efn;fvtlv

APPROVED BY: N.B. Dinh

Technical Manager

A Atomic Energy L' Energia Atomlque

Korea Advanced Energy

), of C8nada Umlltd du Canada, Umlt6e

Resaarch Institute

CANDU Operations Op4rations CANDU

) J

Atomic Energy RELEASE AND REVISION HISTORY L' Energia Atomique

of Canada Limited du Canada, Limitee

RECAPITULATIF DES EMISSIONS ET REVISIONS

Operations Operations CANDU

Codeo/ Code,

W.P. I

Loe. I Lieu Ir, COM

Source UnllNo.(a) RsacttHHNo.(S) NIA

Rat. I R9l.

Sec./ Sec.

Dist. I Dl$t.

, Approval Statue ltat de L' A,cprobatlon I I I

Total No. ol Page& I Nbre. Total d9 Pages

RelNH / EmlasJon No.I No. Date/ Date

Revision / R,v1s1on No.I No. Date/ Date

. Purpose of Release; Oetalla of Rev. I Amendment Program(•) tor Wh!Ch RetHH I• made . But de r ,mlHlon ; d'1all■ de■ r,vJ modlf. Document ,mis pour programme(a) : I I I I I Issue for Information D-AC-0011

Pro, la red By Approved By R"-1114 r ,1 Approuv, par CA ) A

1

88-12-09

PO

88-12-09

D.Gile: ,

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N.B. Dinh

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89-03-03

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89-01-20

Issue for Review and Approval D-AC-0037

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N.B. Dinh

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90.10 c 1

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90-07-20

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PP-939-01

AECL/KAERIPROPRIETARY TS-37-31730-001

Rev. 'l>a'N."8..1 2 3 4 5 6 7

TECHNICAL SPECIFICATION

FOR FABRICATION OF

KMRR

SHUTOFF UNITS

P11lOBl/510

OB.OS

!11/10.W

AECL/KAERIPROPRIETARY TS-37-31730-001 Page i

5 Rev.l"Q.~1 2 3 4 6 7

TABLE OF CONTENTS

SECTION PAGE

1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

2. APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1

3. CLASSIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1

3.1 Code Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - I

4. RESPONSIBILITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1

5. APPLICABLE DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - l

5.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

5.3 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

.-.

6. REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1

6.1 FABRICATION/SPECIAL PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1

6.1.1 Procedure Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1

6.1.2 Fitting and Machining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - I

6.1.3 Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1

6.1.4 Heat Treatment and Stress Relieving . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -2

6.1.5 Straightening of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -2

6.1.6 Fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -2

6.1.7 Surface Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 3

6.1.8 Oxide Surface Coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 3

6.1.9 Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 3

6.1.10 Anodizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -3

6.1.11 Painting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.1.12 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.1.13 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.2 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.3 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

-

6.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.5 Maintainability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.6 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

-.....

,,,,,,

91/lo,tO!I

AECL/KAERI PROPRIETARY TS-37-31730-001 Page ii

Rev. l"Q'N.'6..1234 5 6 7

TABLE OF CONTENTS

SECTION PAGE

6.6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -4

6.6.2 Proprietary Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -5

6.6.3 Trade Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -5

6.6.4 Nuclear Grade Hafnium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -5

6.7 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 5

6.8 Safety ..................................................... 6 -6

6.9 Surge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -6

6.10 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 6

6.11 Burn-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -6

6.12 Function Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -6

6.13 Preparation For Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -7

6.14 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -7

6.15 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 -7

7. WORKMANSHIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1

8. WARRANTY ............................................... 8 - 1

9. INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1

10. QUALITY ASSURANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1

11. INSPECTION, TESTS AND REPORTS . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1

11.1 Inspection and Test Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1

11.2 Purchaser Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1

11.3 Non-Destructive Examination Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1

Material Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1 11.4

11.4.1 Liquid Penetrant Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -2

11.4.2 Radiography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 3

11.5 Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -3

"""""" 'i mo

,1no,og

AECL/KAERIPROPRIETARY TS-37-31730-001 Page iii

Rev. l'Q."N "S..1 2 3 4 5 6 7

TABLE OF CONTENTS

SECTION PAGE

11.6 Weld Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -3

11. 7 Straightness Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 -3

11.8 Inspection Or Test Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 3

12. DOCUMENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 1

13. COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - 1

14. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 - 1

....

''"""'""

91/1 ....

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 1 - 1

Rev. 'l'Q."N." 9.1 2 3 4 5 6 7

1. SCOPE

This specification establishes the requirements for the fabrication of the shutoff

units for the KMRR reactor. The fabrication of the shutoff units will take place in two

production lots. The first production lot of one complete shutoff unit will be used for

performance testing of the mechanism. The second production lot of four complete shutoff units

will be used as the in-service units on the reactor. The test unit, when suitably refurbished and

updated, will become the reactor spare. This production program implies that there will be a

delay between the two production lots, while testing takes place. Also, it may be possible to

waive, temporarily, certain requirements of this technical specification for the first production

lot, if these requirements can be satisfactorily completed during refurbishment.

The requirements of this specification may be supplemented or modified by

specification sheets and/or drawings as detailed in the Contract documents.

In all cases where dual value dimensions (i.e. Imperial and SI units) are used in

this document, the base design unit is identified by underljnjni:.

"°"'"''°

GILIIS

91/1~

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 2- 1

Rev.'Xl"N.."8..1234 5 6 7

2. APPLICATION

This document establishes the requirements for the fabrication of the shutoff (SO)

units for the KMRR reactor. These units are described in DM-37-31730-001 (Reference 1).

The KMRR reactor is a pool type research reactor rated at 30 MW(th). The

reactor will be used for isotope production, particle physics experiments, material testing and

fuel development. The reactor structure, which supports a compact core, is located at the bottom

of a concrete shielded, stainless steel lined pool of light (demineralized) water. The reflector

vessel, which is supported by an inlet plenum and grid plate structure, contains the core that

consists of 23 hexagonal fuel bundles and eight cylindrical fuel bundles each surrounded by a

close fitting flow tube.

In operation, the reactor's generated heat is removed by a pumped vertically

upward flow which is admitted through the inlet plenum and grid plate, flows around the fuel

inside the flow channels and is exhausted into a hexagonal chimney that is open to the pool at its

top. Pipes leading to the primary cooling system pump suction side form outlets low in the

chimney walls. The reactor core, though formed of close packed hexagonal flow tubes, has an

irregular rectangular cross-section and is surrounded by the close fitting reflector vessel

containing the heavy water reflector.

The shutoff units are part of the Reactor Protection System (RPS) which is

documented in DM-37-68000-001 (Reference 2). The function of the four identical SO units is

to rapidly insert neutron absorbing material into the reactor core to effect a rapid reactor

shutdown. The four shutoff rods are suspended around four of the eight cylindrical flow tubes in

the reactor core by individual offset hydraulic cylinder and piston assemblies that mount on the

chimney walls and are powered by four separate external pressurizing pumps. Operation of the

shutoff rods is controlled by opening the pressure line to their cylinder chambers.

PII001l/570

OILl!S

91/lo.G

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 3 - 1

l'Q.N,'8.123 Rev. 4 5 6 7

3. CLASSIFICATION

3.1 CODE CLASSIFICATION

The KMRR shutoff units are not pressure retaining components. However, for

the purposes of quality, the shutoff units shall be fabricated and inspected to the requirements of

ASME Section III, Subsection ND and this technical specification.

'"'""""'

OIU!S

91/10t<9

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 4- I

Rev. l'Q'N."S.123 4 5 6 7

4. RESPONSIBILITIES

KMRR AECL CANDU is the Designer of the shutoff unit. The owner of the

shutoff units is the Korea Atomic Energy Research Institute. The Contractor's responsibilities

include, but are not limited to, the fabrication, manufacturing, production, inspection, testing,

record keeping, packaging and shipping of the components of the shutoff units.

Since the KMRR shutoff unit is not a pressure retaining component, registration

is not required.

PIOO'll/570

OILl!S

91/10/»

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 5 - 1

Rev.'l'Q.'N..'8..1234 5 6 7

5. APPLICABLE DOCUMENTS

5.1 GENERAL

The following documents at the revision in effect on the date of submission of the

tender, or as noted in the Contract Documents, constitute a part of this specification to the extent

specified herein. In the event that certain requirements of the specifications, drawings or data

listed below conflict with the requirements of this specification, the governing requirements

shall be decided by the Designer.

5.2 SPECIFICATIONS

ANSIB1.13M Metric Screw Threads

CSA-B19.l Plain Washers

CSA-B19.2 Helical Spring Washers

CSA-B18.2M Metric Hexagonal Bolts and Nuts

CSA-B78.l Mechanical Engineering Drawing Standards

--

CSA-B78.2 Dimensioning

CSA-B95 Surface Texture Waviness and Lay

CSA-CAN3-Z299-85 Quality Assurance Standard

CSA-B97.l Specification for Fits and Limits

ASTM Material Specification Standards (1)

ASME Boiler and Pressure Vessel Code ( 1)

CRNL Standard MET 95, Issue 2 Procedure for

Oxidizing Zircaloy 2 and Zircaloy 4 (2)

ANSI-Bl8.3.IM Metric Socket Head Cap Screws

CGSB CGSB Standards

1. The applicable sections are identified within this document or on the drawings. NOTES

2.Supplied to the Contractor by the Designer.

5.3 DRAWINGS

The shutoff units shall be built ace rding to the assembly and detail drawings

listed in the Contract documents. The drawings u e standards for drawing symbols, limits, fits,

tolerances, surface finish, etc., as covered in Secti n 5.2

Where not specifically stated on th drawings, surface finish, flatness,

concentricity, alignment, etc., shall be in accord e with the best practice pertinent to the

manufacture of nuclear equipment.

FI0071/5'10

OIJIS

91/UVU

AECL/KAERIPROPRIETARY 5 - TS-37-31730-001 Page 2

Rev. "flQ."N," 8..1 2 3 4 5 6 7

In the drawings, the dimensions are given to surfaces or locations in the "as

finished" conditions. The Contractor shall make his own allowances for machining, fitting,

welding, casting, plating, etc.

The parts list on the drawings does not specify total quantities. The Contractor

shall supply all quantities required for assembly, fitting, adjustment, testing and final acceptance

of the assemblies and components, as specified in the Contract documents.

Pl0071/510

GILES

!11/1~

AECL/KAERIPROPRIETARY TS-37-31730-001 Page 6- 1

Rev.N'N.'S..123 4 5 6 7

6. REQUIREMENTS

6.1 FABRICATION/SPECIAL PROCESS

6.1.1 Procedure Approval

Copies of all procedures shall be submitted to the Designer for approval. Refer to

Section 12 for a list of required procedures and their submission schedule. Any subsequent

changes to approved procedures require re-approval by the Designer who will endeavour to

minimize delays. Only accepted procedures shall be used. Equipment manufactured to

unapproved procedures can not be accepted.

6.1.2 Fitting and Machining

Fitting and machining operations shall be in accordance with best shop practice.

As a minimum requirement, dimensional tolerances, surface finish, alignment, fits, etc., shall be

as specified on the drawings and in this Specification.

All parts shall be free from sharp edges, burrs, nicks, cuts, scratches and other

visible defects.

Machining methods shall be such as to avoid any detrimental effects such as

stress raisers, residual stresses, grinding, cracks, embedment of foreign materials, burning of

surfaces, etc.

All identical parts shall be fully interchangeable, unless they are permanently

assembled or designed as "matched". Fit up and machining methods which alter the drawing

requirements or effect the interchangeability or function of any of the components shall be cause

for rejection of the affected parts. Shimming is prohibited except as specifically allowed on the

drawings.

All joints shall fit uniformly together over their mating surfaces and the

contractor shall ensure that there is no mechanical interference to moving parts over the required

range of motion.

To these ends, the Contractor shall be responsible for his own methods, tooling

and gauging.

6.1.3 Welding

Welding operators and welding procedures used in fabricating the assemblies

shall be qualified in accordance with the requirements of the ASME Boiler and Pressure Vessel

Code Section III, Subsection ND, subarticle ND 4300 and Section IX.

Sample welds, based on the procedures to be used to manufacture the various

types of joints, shall be produced by the Contractor and submitted to the Designer for approval

prior to the commencement of production.

Welds shall be finished smoothly and merge with the parent metal without ridges

or undercutting.

PI0011/510

0 .....

91/1®'

AECL/KAERIPROPRIETARY TS-37-31730-001 Page 6- 2

Rev. l'Q.'N,' 8..1 2 3 4 5 6 7

6.1.4 Heat Treatment and Stress Relieving

On all heat treatment operations, temperature-time charts and records of

quenching treatment, material tests, etc., shall be kept and identified with the parts. These

records shall be submitted to the Designer. Stress relieving and annealing, when specified, shall

be performed prior to finish machining.

Components parts shall be heat treated to meet the material requirements and

conditions specified on the drawings. Test specimens shall be provided with each batch of the

parts being heat treated. Heat treated specimens shall be in conformity with ASTM

Specification A-370 or E-8 and shall be tested accordingly.

All heat treated parts shall be free of cracks and shall be inspected by a process

approved by the Designer, after final machining or any straightening or stress relieving that is

required, to ensure that final dimensions are as per drawing.

For the absorber element assemblies, application of any heat treatment to the

basic tube member must be performed as a stress relief of the entire fabrication.

6.1.5 Straightening of Components

If straightening of tubular components is required, to meet drawing requirements,

it must be performed in a manner causing a minimum of cross-sectional distortion and residual

stress. All straightening shall be done so that minimum working of the metal is required to

achieve the straightness tolerances called up on the drawings. If procedures are required they

are to be approved by the Designer prior to work commencement. An approved procedure must

contain process control to ensure that residual stress in the parts is held to a minimum.

Assemblies which require straightening must be brought to the attention of the Designer and

may have to be stress relieved at the expense of the Contractor.

6.1.6 Fasteners

All threaded fasteners shall be installed using torques prescribed on the drawings

and torque wrenches appropriate to the size and strength of the fasteners. The Contractor shall

produce evidence that the wrenches used have been properly calibrated and tested. In addition,

all threaded fasteners shall be locked according to the drawings requirements.

Where bolt heads and nuts contact otherwise unmachined surfaces, these surfaces

shall be spot faced so as to provide contact over the full area.

All threads shall be Class 6H/6g or better and shall conform to ANSI B 1. 13M

unless otherwise specified on the drawings. All fasteners shall conform to CSA B 18.2M or

ANSI B18.3.IM unless otherwise specified.

Three classes of threaded fasteners are called up on the drawings.

PI0071/571J

on.as

!U/10/24

AECL/KAERIPROPRIETARY TS-37-31770-001 Page 6 - 3

6 7 Rev."PQ.'J\l."'8.1234 5

a. 'Stainless Steel 300 series' identifies fasteners of good commercial quality that meet the

requirements of ASTM A193 Grade B8 or B8M with flash chromium plating to

AMS 2406, 0.003 to 0.008 mm thick.

b. 'Stainless Steel 400 series' identifies fasteners of good commercial quality that meet the

requirements of ASTM A193 Grade B6 with flash chromium plating to AMS 2406, 0.003 to

0.008 mm thick.

c. 'Alloy steel cadmium plated' identifies fasteners of good commercial quality that meet the

requirements of ASTM Al93 Grade B7 with cadmium plating to QQP-416 Type I, Class 3

(for use only outside the pool).

For fasteners made by a reputable manufacturer, the Designer may accept letters of

compliance or such other indirect evidence as he sees fit. In cases of doubt he may require

direct evidence of compliance.

Certain fasteners are wirelocked and require drilled holes for the wire. All other

fasteners shall be locked by an approved locking method.

6.1.7 Surface Finish

Tools and fixtures employed shall not contaminate the surface of the components

.-. with iron or other foreign matter.

All gouges, scratches or marks which occur during manufacture, testing and

shipment shall be repaired to the satisfaction of the Designer.

Gouges up to 2.5 cm (I in) in length are permitted provided they do not exceed

0.125 mm (0.0049 in) in depth and do not impair the function of the component.

Pits which are 6.0 mm (0.236 in) diameter or less and have a depth less than

0.) 25 mm (0.0049 in) are acceptable.

Longitudinal scratches which do not exceed 0,050 mm (0.0019 in) deep are

acceptable.

Where, in the opinion of the Designer, the number of defects is excessive, the part

may be rejected on the basis that uniform high quality is not being maintained (Section 7).

6.1.8 Oxide Surface Coating

Where required on the drawings, Zircaloy components shall be given an oxide

coating in accordance with Specification CRNL MET 95 Issue 2. This oxide is typically light

brown, tan or whitish in colour.

6.1.9 Passivation

Where required on the drawings stainless steel parts shall be passivated as

described in ASTM A380.

6.1.10 Anodizing

Where required on the drawings aluminum alloy parts require anodizing as

described in ASTM B580.

FI0071/570

On.BS

91/10{}4

AECL/KAERI PROPRIETARY TS-37-31730-001 Page 6 -4

Rev.'N.'N..'Q.123 4 5 6 7

6.1.11 Painting

Where required on the drawings carbon steel parts require painting as described

on the drawings.

6.1.12 Assembly

Mechanical assembly of the component parts of the fabrication is to take place in

a clean area. No metal removing operations are to be carried out in this area.

6.1.13 Marking

All items shall be clearly marked, to the approval of the Designer, prior to

packing. Where a shipping container is filled exclusively with identical items individual item

marking may be waived, subject to the approval of the Designer.

All shipping containers and boxes shall be clearly marked to show part number,

stock code or drawing number, serial numbers and quantity of their content. The markings shall

have characters at least one inch high.

PERFORMANCE 6.2

This Section does not apply to the fabrication of the shutoff units.

6.3 OPERATING CONDITIONS

The detailed operating conditions for the shutoff units are listed in the KAERI

Engineering Input Requirements of Reactor Interface Components. (Reference 3). In general,

items in the reactor pool will be exposed to demineralized light water with a maximum

temperature of 60°C and a maximum pressure of 860 kPa(L(} (125 psi(g)). High radiation fields

exist near the reactor core. Above the pool items will be exposed to air at atmospheric pressure

having a maximum temperature of 40°C and 100% relative humidity.

6.4 RELIABILITY

This Section does not apply to the fabrication of the shutoff units.

MAINTAINABILITY 6.5

This Section does not apply to the fabrication of the shutoff units.

6.6 MATERIAL

6.6.1 General

Material used in the fabrication of the components shall be as specified on the

drawings. Where an alternative material is proposed it shall be subject to approval by the

Designer. Final material conditions are to be as specified on the drawings.

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Materials, processes and pans which are not specifically designated herein and

which form pan of the shutoff units shall be of good commercial quality, and in accordance with

good practice pertinent to the manufacture of nuclear equipment.

All materials, pans and equipment shall be new.

6.6.2 Proprietary Material

Where proprietary materials are specified on the drawings, it shall be the

Contractors responsibility to ensure that such materials conform to the standards given in the

proprietary material manufacturer's specification.

6.6.3 Trade Names

In order to state definitely the quality and type of materials and equipment

required for this work, trade names have been used on the drawings. Substitution of fully equal

materials and components specifically named, may be made only with the written approval of

the Designer.

The Contractor shall be responsible for the correct procurement of any

proprietary article listed under the manufacturer's trade names and pan numbers. The

Contractor shall also be responsible for any special requirements for the proprietary articles in

order to meet the requirements of the drawings and this Specification.

The Contractor shall be responsible for the correct performance of the proprietary

articles to the individual maker's performance specifications including any special requirements,

and shall replace at no expense to the Designer any anicle failing to meet the requirements of the

drawings and specifications.

6.6.4 Nuclear Grade Hafnium

The chemical composition of reactor or nuclear grade hafnium shall be as

specified in ASTM B737 Grade RI except that the following additional limits will apply:

Impurity Element Content (parts per million)

Max. .Min...

columbium 100

iron 500 200

oxygen 400 100

silicon 50

tin 30

uranium isotope 235 0.07

zirconium 45000

6.7 CLEANING

All grease, oil, scale, grit, weld spatter, NDT compounds, moisture and other

foreign material shall be completely removed from all pans. All surfaces that cannot be cleaned

and/or examined after assembly shall be cleaned prior to assembly.

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Adequate precautions shall be taken to ensure that cleanliness is maintained

through to the completion of the work.

Tests for determining cleanliness shall be subject to the approval of the Designer.

Either a solvent or detergent solution, or both may be used for cleaning. Solvents and detergents

shall have a maximum of 100 µg of halogens per gram and 1% by weight of sulphur, and shall

be subject to the approval of the Designer. An acceptable solvent specification is ASTM D484.

Manufacture, processing and handling of parts shall be such as to avoid

cor.tamination by material such as iron, grit, lead, halogens or sulphur. Only clean silica sand

shall be used for grit blasting. When liquid penetrant inspection is to follow blasting only sharp

sand is to be used (not shot).

Only clean stainless steel brushes and chip hammers and iron free grinding

wheels shall be used on stainless steel parts. Halogenated plastic shall not be used for tools or

fixtures that contact any part of the assembly.

If water rinsing is employed, only clean potable water shall be used. The parts

shall be dried within one-half hour after rinsing.

Surfaces shall be thoroughly dried, using dry lint-free cloths, and unpressurized

oil-free warm air with a maximum temperature of .ill°C (257°F).

6.8 SAFETY

The Contractor is responsible to meet all occupational health and safety

standards.

6.9 SURGE PROTECTION

This Section does not apply to the fabrication of the shutoff units.

6.10 GROUNDING

This Section does not apply to the fabrication of the shutoff units.

6.11 BURN-IN

This section does not apply to the fabrication of the shutoff units.

6.12 FUNCTION CHECK

The contractor will be responsible for checking the free and adequate motion of

the items and subassemblies from the second production lot listed below. This function check

will include any assembly work that is required to complete the subassemblies and observation

of free and adequate motion of the items. Assembly of the subassemblies into a complete

system assembly is not required. The items to be checked are:

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the hydraulic cylinder,

- the assembly of the track, carriage and tie rod.

6.13 PREPARATION FOR SHIPMENT

The Contractor shall be responsible for protecting all components specified herein

against corrosion and damage of any kind during all stages of manufacture, inspection, handling

and shipping. The packaging procedure shall be submitted to the Designer for approval.

6.14 STORAGE

After cleaning, all components shall be stored in dry dust-free containers of

polyethelene or other suitable material, until used in the next step or prior to shipping.

6.15 PACKAGING

The Contractor shall pack the components in suitable wooden boxes which shall

be sealed against the entry of dirt, water, and foreign material. He shall make such provisions as

are necessary to ensure that the assemblies are protected from damage, corrosion or

contamination of any sort during handling and shipment to an overseas construction site.

All protective coatings and packaging procedures shall be subject to approval by

the Designer.

The shipping boxes shall be particularly adapted to preserve the straightness of

long slender assemblies. Intermediate support points shall be provided to minimize sag and

vibration during transit. Particular attention shall be paid to ensure that the standards of

cleanliness are maintained during packing and shipping.

Immediately prior to packing for shipment, the absorber elements shall be

examined for cleanliness. No particulate matter or dirt shall be permitted. Upon completion of

this examination, the absorber elements shall be sealed in heavy gauge polyethelene sheet or

tubing and secured in sturdy wooden shipping containers. The containers shall be dust tight and

easily opened for inspection. The absorber elements when received at the construction site shall

be ready for installation in the reactor without any further cleaning being necessary.

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7. WORKMANSHIP

Workmanship shall be such as to ensure that all items are of a uniform high

quality and meet all of the requirements of this specification and related Contract documents and

are suitable for their intended purpose.

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