ML17277A496

Advises That Probability of Unacceptable Damage to safety- Related Sys & Components Due to Turbine Missiles Acceptably Low Provided Turbine Missile Generation Probability Maintained for Life of Plant by Acceptable Maint Program

ML17277A496
Person / Time
Site:	Columbia
Issue date:	03/16/1983
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Ferguson R WASHINGTON PUBLIC POWER SUPPLY SYSTEM
References
TAC-62181, NUDOCS 8303210017
Download: ML17277A496 (4)

Text

4 MAR 18 1S83 Docket No. 50-397 M. R. L. Ferguson Managing Director Hashfngton Public Power Supply System P. 0. Box 968 3000 George tlashfngton tlay Rfchl and, hlashf ngton 99352 DISTRIBUTION:

Document Control (50 397) l NRC PDR L PDR NSIC PRC LBII2 Reading EHylton RAuluck

Paton, OELD ACRS (16)

ELJordan, DEQA:IE

JMTaylor, DRP:IE Region V

Subject:

Turbine ltafntenance Commitment for 1JNP-2 Turbine Hfssfle Issue tie have reviewed the 1JNP-2 facility with regard to the turbine missile fssue and conclude that the probabflfty of unacceptable damage to safety-related systems and components due to turbfne missf les fs acceptably low (i.e., less than 10-" per year) provided that the turbine missile genera-tion probability fs maintained to be 10 5 per reactor year or less for the life of the plant by an acceptable maintenance program.

In reaching this conclusion, the staff has factored into consideration the unfavorable orientation of the turbine generator.,

The staff considers the turbine mfssile issue as a confirmatory item ff tlashfngton Public Power Supply System 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 mfssfle generation probabilfties, or (b)

Volumetrically inspect all low pressure turbine rotors at the second refuelfhg outage and every other (alternate) refueling outage thereafter until a maintenance program fs approved by the staff, and-(c)

Conduct turbine steam valve maintenance, (followfng initiation

. 'of power output), fn accordance with present NRC recommen'datfons as stated fn SRP Section 10.2 of NUREG-0800.

Please contact Raj Auluck,, Lfcensfng Project Manager, if you desire any discussion or clarfffcatfon on this issue.

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R. L. Ferguson liana-',ng Director Mashing on Public Power Supply'ystem P.

0. 3ox 968 3000 George Washington May Richland, i'ashington 99352 CC:

Hicho'.as Reynolds, Esquire Qeb evoi s e 5 Lib e rman 1200 Seventeenth

Street, H. M.

Washington, Q.

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20036 hr. G.E.

Doupe, Esquire Mashington Public Power Supply System P.O.

Box 968 3000 George Mashington May

Richland, Washington 99352 t<icholas Lewi s, Chairman Energy Facility Site Evaluation Council Hail Stop PY-ll Olympi a, Mashington 98504 Roger 4'son, Licensing Hanager Washington Public Power Supply System P.O.

Box 968" Ri chl and, Washington

. 9Q5g hr. M.G. Conn, Sr.

H/t4 Group Supervisor Bur ns a nd P oe, Incorporated 601 Milliams Boul evard Richl and, Mashington 99352 t>r. Richard Feil U,S, t!RC.Resident Inspector

'i'~PSS-2 t!PS P.O.

Box 69 R ichl and, Ma shington 99352 Qr. G.Q.

Bouchey Qeputy Qirector, Safety E Security Washington Public Power Supply System P.O.

Box 968, tlQ 650

Richland, Mashington 99352,