ML20134M795
| ML20134M795 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 11/19/1996 |
| From: | Graesser K COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BYRON-96-0299, BYRON-96-299, NUDOCS 9611260043 | |
| Download: ML20134M795 (2) | |
Text
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Commonwealth litiwn Company l
,Ilyron Generating Station 4150 Noith German Church Road f
flyron, 11.61010-9794 f
'fel H I 5-245441 November 19, 1996 LTR:
BYRON 96-0299 FILE:
1.10.0101 U.S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk
SUBJECT:
Byron Nuclear Powar Station Units 1 and 2 Response to Request for Docketed Information NRC Docket Numbers 50-454. 50-455
REFERENCE:
Ronald N. Gardner request per Conference Call dated November 12, 1996, between Byron /Braidwood/NRC/NRR, discussing planned corrective actions on Westinghouse Model DS 206 489V Circuit Breakers This letter documents actions to be taken by Byron Station in response to recent failures of Westinghouse Model DS 206 480 Volt l
Circuit Breakers at Braidwood. Discussions regarding the breaker l
failures and subsequent testing have been held between Comed and the l
United States Nuclear Regulatory Commission (NRC) Staff. During the most recent call (Reference 1), Comed was asked to provide details on the short-term and long-term corrective actions to be taken to ensure the continued satisfactory performance of the Westinghouse Model DS 206 l
480 Volt Circuit Breakers at Byron.
j l
Byron Station has been actively involved in reviewing and evaluating our Westinghouse DS breaker performance.
Byron Station has 1
j approximately 112 safety-related DS 206 breakers, of which, 32 are critical. We have developed, with Robert Crosby (Maintenance Staff) as our project lead, short and long-term corrective actions.
In the short-term, Byron $tation has accelerated its overhaul project. We are having refurbished, through Westinghouse, six (6) spare safety-related DS 206 breakers. Our plans are to utilize these six breakers, when they return from Westinghouse, to swap with critical breakers. We plan to have completed refurbishment on six (6) additional DS 206 breakers by the end of December, 1996.
We will assess the
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condition of breakers as we go and if similarities to Braidwood are identified, we will aggressively pursue resolution.
CCD0AQ 9611260043 961119 PDR ADOCK 05000454 P
PDR A Unicom Company
I e
e' r
Byron Ltri 96-0299 November 19; 1996 i
Page 2 In the long-term, Byron Station will utilize on-line maintenance, outage maintenance, and priority maintenance to determine the list of priority breakers to begin refurbishment.
Beginning in February, 1997, Byron in cooperation with Braidwood plan to refurbish all 32 of Byron's critical DS 206 breakers by June, 1997, and a significant portion of the remaining DS/DHP-type breakers by the end of 1997.
We plan to refurbish as many breakers as practical over the next three (3) years.
If your staff has any questions or comments concerning this letter, please refer them to Don Brindle, Regulatory Assurance Supervisor, at (815)234-5441 ext. 2280.
Respectfully, LM&.1&c -
K.
L.
Graesser Site Vice President Byron Nuclear Power Station KLG/DB/rp cc:
A.
B. Beach, NRC Regional Administrator - RIII G.
F. Dick Jr., Byron Project Manager - NRR S. D. Burgess, Senior Resident Inspector, Byron R. D. Lanksbury, Reactor Projects Chief - RIII F. Niziolek, Division of Engineering - IDNS D.
L.
Farrar, Nuclear Regulatory Services Manager, Downers Grove Safety Review Dept, c/o Document Control Desk, 3rd Floor, Downers Grove DCD-Licensing, Suite 400, Dowers Grove.
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