ML20209C549

Requests That Util Agree to Submit Turbine Maint Program within 3 Yrs of Obtaining OL or Inspect LP Turbine Rotors During Second Refueling Outage.Final Evaluation to Be Made Upon Receiving Agreement

ML20209C549
Person / Time
Site:	Satsop
Issue date:	11/01/1983
From:	Johnston W Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
References
CON-WNP-1464 NUDOCS 8311140058
Download: ML20209C549 (3)

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NOV i 19 83 Docket No. 50-508 MEMORANDUM FOR: Thomas M. Novak, Assistant Director for Licensing Division of Licensing FROM: William V. Johnston, Assistant Director Materials, Chemical & Environmental Technology Division of Engineering

SUBJECT:

WASHINGTON PUBLIC POWER SUPPLY SYSTEM (WPPSS), WNP-3, DRAFT SAFETY EVALUATION REPORT -

Plant Name: Washington Nuclear Power, Unit 3 Suppliers: Westinghouse (Turbine)

Docket No.: 50-508 Responsible Branch & Project Manager: LB #3, A. Vietti Reviewer: S. J. Bhatt Description of Task: Draft Safety Evaluation Report Review Status: Commitment Requested In order to reclassify the turbine missile issue from "open item" to

" confirmatory," we request that Washington Public Power Supply System agree to submit to the NRC a turbine maintenance program based on NRC approved manufacturer's analyses of the probability of missile pro-i ducing turbine failure within 3 years of obtaining an operating license.

l If such a program is not received and approved by us within 3 years, the applicant is to inspect all LP turbine rotors during the second refueling outage. A similar request was also made for WNP Unit 2.

I - We will provide a detailed final evaluation for the WNP-3 SER on receiving the applicant's agreement to our request.

lial William V. Johnston, Assistant Director Materials, Chemical & Environmental Technology Division of Engineering

Attachment:

WNP-3 Turbine Maintenance I

cc: See next page

Contact:

S. J. Bhatt Y9A2 l

311140058 831101 ADOCK 05000 8

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Thomas M. Novak 40V

. 19 83 cc: R. Vollmer D. Eisenhut E. Sullivan S. Pawlicki G. Knighton A. Vietti B. D. Liaw W. Hazelton C. Cheng R. Klecker S. Bhatt DISTRIBUTION:

Docket File MTEB Reading File '

MTEB WNP-3 File a

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1 ATTACHMENT TURBINE MAINTENANCE COMMITMENT FOR THE WNP UNIT 3 MISSILE ISSUE We have reviewed the WNP Unit 3 facility with regard to the turbine missile issue and conclude that the probability of unacceptable damage to safety related systems and components due to turbine missiles is acceptably low (i.e., less than 10' per year) provided that the tur-bine missile generation probability is maintained to be 10'4 per reactor year or less for the life of the plant by an acceptable main-tenance program. In raching this conclusion, the staff has factored into consideration the' favorable orientation of the turbine generator.

The staff considers the turbine missile issue as a confirmatory item if the applicant agrees to:

a) submit for NRC approval, within three years of obtaining an operating license, a turbine system maintenance program based on the manufacturer's calculations of. missile generation probabilities, or i b) volumetrically inspect all low pressure turbine rotors at the second refueling outage and every other (alternate) refueling outage thereafter until a maintenance program is approved by the staff; and conduct turbine steam valve maintenance, (following i

initiation of power output) in accordance with present NRC recom-mendations as stated in SRP Section 10.2 of NUREG-0800.

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