ML023650161

E-mail to Gerry Riste from John Lamb Dated December 20, 2002

ML023650161
Person / Time
Site:	Kewaunee
Issue date:	12/20/2002
From:	John Lamb Office of Nuclear Reactor Regulation
To:	Riste G Nuclear Management Co
References
Download: ML023650161 (1)

Text

From:

John Lamb To:

internet: GERALD.RISTE@nmcco.com Date:

12/20/2002 11:26:43 AM

Subject:

Kewaunee TS 4.6 RAI

Gerry, The following are the questions asked during todays conference call:

1. A brief description of the offsite power system. A discussion on the reliability and availabillity of offsite power sytems. The discussion should include duration and cause.

2. Does Kewaunee has a Alternate A.C source that can be substituted for this DG during the PM in the event of a loss of offsite power and failure of the other DG?

3. What type of post maitenance testing is required by the manufacturer and how it will be done during power operation? Is a full load rejection test test required as part of the post maintenance testing?

4. What are the current reliabilties and unavailabilities of the DGs?

5. What compensatory measures are taken during maintenance?

6. Information needed in a PRA -based submittal would be (based on RGs 1.177 and 1.174):

a) Baseline core damage frequency (CDF) b) Baseline large early release frequency (LERF) c) Delta core damage frequency (delta CDF) d) Delta large early release frequency (delta LERF) e) Incremental conditional core damage probability (ICCDP) f) Incremental conditional large early release probability (ICLERP) g) Discussion of PRA quality ( including Owners Group findings and observations, if any) h) Discussion of external events i) Existence of any (even approximate) shutdown PRA j) Discussion of when, during an outage, EDG testing is presently performed.

Thanks.

John

CC:

Lakshminaras Raghavan; Millard Wohl; Om Chopra