ML20213E542

Forwards Reactor Sys Branch Sser Re TMI Item II.K.3.18 Re Mods to Automatic Depressurization Sys.Conceptual Design Acceptable,Subj to Listed Conditions

ML20213E542
Person / Time
Site:	Columbia
Issue date:	08/09/1983
From:	Houston R Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
References
CON-WNP-0628, CON-WNP-628, TASK-2.K.3.18, TASK-TM NUDOCS 8308170160
Download: ML20213E542 (2)

Text

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AUG 0 91983 Docket No.: 50-397 MEMORANDUM FOR: Thomas Novak, Assistant Director for Licensing. DL FROM: R. Wayne Houston, Assistant Director for Reactor Safety, DSI

SUBJECT:

SUPPLEMENTAL SAFETY EVALUATION REPORT (WNP-2)

Plant Name: WPPSS Nuclear Project No. 2 Docket Number: 50-397 Licensing Stage: OL Responsible Branch: Licensing Branch f2 Project Manager: R. Auluck DSI Branch Involved: Reactor Systems Branch Enclosed is the Reactor Systems Branch SSER with regard to THI Action Plan Item II.K.3.18 at WNP-2. The conceptual design proposed by the applicant is acceptable.

R. Wayne Houston, Assistant Director for Reactor Safety Division of Systems Integration

Enclosure:

As stated DISTRIBUTION cc: R. Mattson N D. Eisenhut RSB Rdg.

A. Schwencer RSB Plant R. Auluck TCollins Section 8 Members, RSB Collins Rdg.

RSB Section Leaders WHodges BSheron AD/RS Rdg.

CONTACT: T. Collins, x24478 l

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SAFETY EVALUATION REP,0RT

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• WNP-2 .,

TMI ITEM II.K.3.18 In a letter dated July 26, 1983, from G. Bouchey to the Director, NRR, the Washington Public Power Supply System committed to modifying the Automatic Depressurization System (ADS) at the WNP-2 plant. The design modification will bypass the high dry-well pressure trip portion of the existing ADS logic and also add a manually operated inhibit switch. This modification is Option 2 of the BWR Owners Group Report provided in reference 1 and has been approved by the staff as discussed in reference 2.

The applicant's conceptual design is acceptable to us with the following conditions: (1) Use of the manual inhibit switch must be addressed in the plant emergency procedures; (2) surveillance requirements for the inhibit switch must be included in the plant technical specifications; and (3) the modifications must b e c o m--

plete prior to startup f'o l l o w i n g the first refueling outage.

References

1. Letter from T. J. Dente toD. G. Eisenhut, "NUREG-0737 Item II.K.3.18e Modification of Automatic Depressurization System Logier" dated October 28, 1982

2. Memorandum from R. W. Houston to G. Lainase " Evaluation of BWR Owners Group Generic Response to Item II.K.3.18 of NUREG-0737, Modification of Automatic Depressurization System Logic," dated April 1, 1983