ML091610513

G20090327/EDATS: OEDO-2009-0359 - Tom Gurdziel Ltr. Pressurized-Water Reactor - Palo Verde/Cook Unit 1 - Incoming

ML091610513
Person / Time
Site:	Palo Verde, Cook
Issue date:	05/31/2009
From:	Tom Gurdziel - No Known Affiliation
To:	Borchardt R NRC/EDO
References
EDATS: OEDO-2009-0359, G20090327, OEDO-2009-0359
Download: ML091610513 (4)

Text

EDO Principal Correspondence Control FROM: DUE: 07/01/09 EDO CONTROL: G20090327 DOC DT: 05/31/09 FINAL REPLY:

Tom Gurdziel Oswego, New York TO:

Borchardt, EDO FOR SIGNATURE OF : ** GRN ** CRC NO:

Leeds, NRR DESC: ROUTING:

Pressurized-Water Reactor - Palo Verde/Cook Unit 1 Borchardt (EDATS: OEDO-2009-0359) Virgilio Mallett Ash Ordaz Burns/Gray DATE: 06/09/09 Satorius, RIII Collins, RIV ASSIGNED TO: CONTACT: Shoop, OEDO NRR Leeds SPECIAL INSTRUCTIONS OR REMARKS:

I-emPI a~e, El_ýO -00

EDATS Number: OEDO-2009-0359 Source: OEDO GeneralInfomaio Assigned To: NRR OEDO Due Date: 7/1/2009 5:00 PM Other Assignees: SECY Due Date: NONE

Subject:

Pressurized-Water Reactor - Palo Verde/Cook Unit I

==

Description:==

CC Routing: Region 1Il; Region IV ADAMS Accession Numbers - Incoming: NONE Response/Package: NONE Ote Infomaio Cross Reference Number: G20090327 Staff Initiated: NO Related Task: Recurring Item: NO File Routing: EDATS Agency Lesson Learned: NO Roadmap Item: NO Action Type: Letter Priority: Medium Sensitivity: None Signature Level: NRR Urgency: NO OEDO Concurrence: NO OCM Concurrence: NO OCA Concurrence: NO Special Instructions:

Doumn Infomaio Originator Name: Tom Gurdziel Date of Incoming: 5/31/2009 Originating Organization: Citizens Document Received by OEDO Date: 6/9/2009 Addressee: R. W. Borchardt, EDO Date Response Requested by Originator: NONE Incoming Task Received: Letter Page 1 of I

9 Twin Orchard Drive Oswego, NY 13126 May 31, 2009 Mr. R. William Borchardt, Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Dear Mr. R. William Borchardt:

I am writing this letter to explain a problem I have with what appears to be a PWR practice.

My recollection from when I worked on an Operations Department shift at a BWR is that, when there was a problem with the turbine, (like high vibration), the turbine was tripped.

It followed that the reactor tripped automatically if the steam flow was above the capacity of the bypass valves.

Recently, I have been reading about a couple of PWR turbine vibration problems where the practice appears to be to trip, not the turbine, but the reactor. Could you have somebody check that what is presently being done is appropriate?

(The two problems I have seen are the Cook 1 turbine blade failure in about September, 2008, and Palo Verde 3 from Event Number 44970.)

Thank ou, Tom CGurddziel EDO -- G20090327

.U.S. GPO: 2004-307-316/81187 U

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