ML101660608

Phoncon to Discuss RV-06

ML101660608
Person / Time
Site:	Columbia
Issue date:	06/15/2010
From:	Lyon F Plant Licensing Branch IV
To:	Gregoire D Energy Northwest
Lyon, C F, NRR/DLPM, 415-2296
References
TAC ME4046
Download: ML101660608 (1)

Text

From: Lyon, Fred Sent: Tuesday, June 15, 2010 3:09 PM To: Gregoire, Donald W.

Cc: Farnan, Michael

Subject:

Phoncon to Discuss RV-06 (TAC No. ME4046)

The relief request from Energy Northwest (EN) dated June 9, 2010, was discussed during a phoncon on June 15, 2010, between F. Lyon and M. Farnan (NRC) and D. Gregoire, K.

Christianson, B. Simon, et al. (EN).

EN has not provided a sufficient basis for concluding that compliance with the specified requirement would result in a hardship or unusual difficulty without a compensating increase in the level of quality and safety.

The precedents cited by EN in its relief request had the following data to support justification for relief:

1) Historical performance of the valve

2) System description that noted normal operation would not cause accelerated degradation

3) Industry operating experience review.

The EN submittal cited an industry operating experience review.

The NRC staff requested the licensee consider the following in providing additional justification for its request:

1) What was the history of the valve before it was replaced?

2) In what type of environment is the valve located? Does the environment accelerate degradation?

3) Why was the Crosby Omni series selected? The licensees technical equivalency may provide additional supporting justification for the relief request.

4) What is the history of similar valves (9511882A) installed at CGS? Has maintenance been performed on the similar valves and if so, what were the results? Were the valve internals found during maintenance to be in good condition?

5) What is the impact if the valve does not perform its safety function (i.e., does not lift at desired set point)?

6) What is the risk or probability that an overpressure event would challenge the valve?

The supplement to the relief request should contain all of the reasons why EN justifies extending the valve test frequency an additional 11 months.

Subsequent to the phoncon, the licensee stated that it expected to provide a supplement by June 18, 2010.

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Subject:

Phoncon to Discuss RV-06 (TAC No. ME4046)

Sent Date: 6/15/2010 2:49:09 PM Received Date: 6/15/2010 3:09:00 PM From: Lyon, Fred Created By: Fred.Lyon@nrc.gov Recipients:

dwgregoire@energy-northwest.com (Gregoire, Donald W.)

Tracking Status: None Michael.Farnan@nrc.gov (Farnan, Michael)

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 13859 6/15/2010 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: