ML20244D261

Forwards Mechanical Engineering Branch Safety Evaluation Re Elimination of Arbitrary Intermediate Pipe Breaks.Request Acceptable for Unit 1 Only.Fsar Section 3.6(B) Will Be Revised to Reflect Changes to Criteria

ML20244D261
Person / Time
Site:	Seabrook, 05000000
Issue date:	03/18/1985
From:	Bosnak R Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
Shared Package
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References
FOIA-87-51 NUDOCS 8503260109
Download: ML20244D261 (3)

Text

- ' [) (, /.i MAR 181985 i

Docket Nos.: 50-443 and 50-444 MEMORANDUM FOR: Thomas M. Novak, Assistant Director for Licensing '

FROM:

Division of Licensing Robert J. Bosnak, Acting Assistant Director

[

for Components & Structures Engineering l Division of Engineering

SUBJECT:

SEABROOK NUCLEAR STATION UNIT 1 - ARBITRARY INTERMEDIATE PIPE BREAKS

References:

1. Letter from J. DeVincentis, Public Service of New Hampshire (PSNH) to G. W. Knighton, NRC, dated February 7, 1985,

Subject:

Elimination of Arbitrary Intermediate Pipe Breaks

2. Letter from J. DeVincentis, PSNH, to G. W. Knighton, i NRC, dated February 19, 1985,

Subject:

Elimination of '

Arbitrary Intermediate Pipe Breaks; Retransmittal of Attachment D, Potential for Stress Corrosion Cracking

3. Memo dated March 20, 1984 from J. P. Knight to T. Novak,

Subject:

SSER for Catawba 2 en Arbitrary Intermediate Pipe Breaks The Mechanical Engineering Branch has reviewed the Public Service of New l Hampshire (PSNH) submittal (Ref.1) dealing with alternative pipe break l criteria that would eliminate arbitrary intermediate pipe breaks in all high energy piping systems except the main feedwater system at the Seabrook Station, Unit 1. Our evaluation of the applicant's submittal is attached.  ;

Based on our review of the applicant's technical justification for elimination of arbitrary intermediate breaks given in Attachments A through E to its I submittal, we have concluded that the applicant's request is acceptable. i This approval is applicable to Unit 1 only, since the applicant's submittal (Ref.1) gives details of proposed breaks, etc., to be eliminated for Unit I and not for Unit 2. The applicant's staff has been apprised of this during a telecon between Victor Nerses and Raman Pichumani of the NRC staff and Robert Sweeney on March 5,1985.

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Thomas M. Novak 1 This subject is being treated as a justified deviation frcm Section 3.6.2 of the Standard Review Plan (SRP) as was done in the case of the Catawba Plant, Unit 2 (Ref.3). Action to revise the SRP Section 3.6.2 will be taken in the future under the purview of the Task Group on Pipe Break of the NRC Piping Rev lew Comittee.

1 Subsequent to NRC approval of this request, the applicant will revise the FSAR, Section 3.6.(B) to reflect these changes to the postulated pipe break criteria.

Robert J Bosnak, Acting Assistant Director for Components & Structures Engineering Division of Engineering

Attachment:

As stated cc: J. P. Knight, DE W. Shields, ELD J. Alzheimer, ETEC G. Knighton, DL V. Nerses, DL F. Cherny, DE H. Bramer, DE S. Hou, DE R. Pichumani, DE cc: w/o Attachment L. Shao W. Johnston R. Klecker l

• Please see previous concurrence.

DFC :0E:MEB :DE:MEB :DE:MEB :DE:MEB :DE:Act. DCSE  : :

e....:.___________:____________:___._______.____________.______ ..__._,,,,,,____ .__,,,,,,,__

KAME :5520/vgt tRPichumani ?HBramer T

. Cherny :RJBosn<  :  :

l_____:____________:____________:_/___________:____________.___j.

BATE :3/13/85 :3/ /85 :3 /85 :3/ /85 :3/lV85  : _______.________,....____

1 nreterm orenen enov . _ _ _ _ _ _ _ _ _ _ _ . _ _ __ ___ _ _ _ _ _ _____ _ _ _ _ _ -

t 1

N Thomas M. Novak . .

This subject is being treated as a justified deviation from Section 3.6.2 of tre Standard Review Plan (SRP) as was done in the case of the Catawba Plant, Unit 2 (Ref.3). Action to revise the SRP Section 3.6.2 will be taken in the future under the purview of the Task Group on Pipe Break of the NRC Piping Review Committee.

C approval of this request, the applicant will revise the FSAR, SLbsequent Section 3.6.(B), to NJ'feflect these changes to the postulated pipe break criteria.

l t

Robert J Bosnak, Acting Assistant Director for Components & Structures Engineering Division of Engineering  !

Attachment:

As stated cc: J. P. Knight, DE W. Shields, ELD s J. Alzheimer, ETEC 's G. Knighton, DL ',

V. Nerses, DL F. Cherny, DE H. Brammer, DE S. Hou, DE j

R. Pichumani, DE cc: w/o Attachment L. Shao W. Johnston R. Klecker 1

I l

n .

OFC :DE:MEB :DE:MEB / :DE:MEBa :DE:M  : :

.....:............:....... . . : .. .. .. F...:....(pp t.f /A .qL// :DE: Act. ADCSE NAME :5520/vgt :RPichuman'i :HBrammer :FCherhy,-It-:------------:----------,-:-----------

RJBosnak  : -

DATE :3/13/85 :3/ite/85 :3/l!I/85 :3//2$f85 :3/ /85  :  : .

ncrrrial errnon copy