ML091610513
| 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:
- Oswego, New York TO:
Borchardt, EDO FOR SIGNATURE OF :
- GRN CRC NO:
- Leeds, NRR DESC:
ROUTING:
Pressurized-Water Reactor
- Palo Verde/Cook Unit 1 (EDATS: OEDO-2009-0359)
Borchardt Virgilio Mallett Ash Ordaz Burns/Gray Satorius, RIII Collins, RIV
- Shoop, OEDO DATE: 06/09/09 ASSIGNED TO:
NRR CONTACT:
Leeds SPECIAL INSTRUCTIONS OR REMARKS:
I-emPI a~e, El_ýO -00
EDATS Number: OEDO-2009-0359 Source: OEDO GeneralInfomaio Assigned To: NRR Other Assignees:
Subject:
Pressurized-Water Reactor - Palo Verde/Cook Unit I
==
Description:==
OEDO Due Date: 7/1/2009 5:00 PM SECY Due Date: NONE 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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