ML20137A931
| ML20137A931 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 01/09/1986 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Adensam E Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8601150003 | |
| Download: ML20137A931 (2) | |
Text
_
e*
January 9,1985
('O Docket No. 50-354 DISTRIBUTION dN NRC POR Local PDR MEMORANDUM FOR: Elinor Adensam, Director FOB: DBL Reading BWR Project Directorate #3 RPichumani Division of BWR Licensing DVassallo HBramer FROM:
Gus C. Lainas, Assistant Director FCherny for BWR RBosnak Division of BWR Licensing BLiaw Glainas
SUBJECT:
ELIMINATION OF ARBITRARY INTERMEDIATE PIPE BREAKS - HOPE CREEK GENERATING STATION, UNIT 1
References:
1.
Letter dated December 18, 1985 from R. L. Mitti, Public Service Electric and Gas Co. (PSE&G) to E. Adensam NRC, subject cited above.
2.
Memorandum dated September 17, 1985 from R. J. Bosnak to T. M. Novak, subject:
" Hope Creek Generating Station Unit 1 - Elimination of Arbitrary Intermediate Pipe Breaks."
3.
Memorandum dated September 20, 1985 from W. R. Butler, NRC to R. L. Mitti, PSEG, subjects:
"Use of Code Case N-411" and " Elimination of Arbitrary Intermediate Pipe Brea ks. "
The former Mechanical Engineering Branch staff has reviewed the applicant's submittal that seeks the NRC approval for eliminating postulation of 8 arbitrary intermediate breaks (AIP's) in the Main Steam (MS) system and 3 AIB's in the Reactor Water Cleanup (RWCU) System inside containment at Hope Creek (Reference 1).
Its evaluation of the applicant's proposal is given below.
NRC has previously approved elimination of 70 AIB's in high energy piping systems at Hope Creek including 2 breaks in the MS system and 13 breaks in the RWCU, all of them outside Containment (References 2 and 3). The breaks proposed to be eliminated now are inside the containment. The criteria used for approving the elimination of the arbitrary intermediate breaks outside the containment are identical to those used for the breaks inside the containment. These criteria are discussed in detail in Reference 2.
The applicant has provided in Reference 1 the necessary information pertaining to the arbitrary breaks proposed to be eliminated and justified elimination of 8 breaks in the MS system and 3 breaks in the RWCU system inside the containment.' The applicant has stated that, at these break g115g g T A
Elinor Adensam i i
i locations, the Code stresses and usage factors do not exceed the permissible limits described in Reference 2.
Furthermore, the applicant's submittal confirms that the MS and RWCU systems inside the containment are
?
not susceptible to the 3 additional adverse conditions described in Reference 2, namely (1) intergranular stress corrosion cracking, (2) i large unanticipated dynamic loading such as water / steam hammer, and (3) thennal fatigue in fluid mixing situations.
In addition, the applicant has provided a commitment that elimination of arbitrary intermediate pipe i
breaks will not affect the environmental qualification of safety related i
j equipment in the vicinity of the AIB locations. Based on a review of the applicant's present submittal (Reference 1) the staff concludes that our previous evaluation (Reference 2) of the applicant's request to eliminate AIB's outside the containment envelopes, and is applicable to, this request to eliniinate the AIB's inside the containment.
J In view of the facts discussed above, the staff finds the applicant's request to eliminate 8 AIB's in the MS system and 3 AIB's in the RWCU system acceptable.
Original signed by/
t Gus C. Lainas, Assistant Director for BWR 1
l Division of BWR Licensing i
cc:
R. Bernero I-T. Speis i
f D. Wagner l
R. LaGrange i
y l'
i i
- Please see previous concurr ce page I
i i
FOB: DBL FOB: DBL EB:DPL-A EIB:DSRO EIB:DSR0 EB: DBL RPichumani:rc* DVassallo HBramer*
FCherny*
RBosnak*
BLiaw*
j 12/24/85 Ol/y/86 01/06/86-01/06/86 01/07/86 01/07/86 l
AD-BWR: DBL 1
Glainas*
01/07/86 t
i I
t
- _ _ _ _ - - - - _ ~ _
, _., _ -