ML20140F756
| ML20140F756 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 03/27/1986 |
| From: | George Alexander COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 1479K, 1479K1-3, IEB-81-03, IEB-81-3, NUDOCS 8604010150 | |
| Download: ML20140F756 (1) | |
Text
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'N Commonwealth Edison
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) One First Nationil Ptua. Ch>cigo Ithno s
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7 Addr:ss Heply to Post Office Bos 767
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Chicago Ithnois 60690 March 27, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Conunission Washington, DC 20555
Subject:
Dresden Station Units 2 and 3 Update on Activities Related to IS Bulletin 81-03, Flow Blockage of Cooling Water to Safety System Cotaponents by Corbicula and Mytilus Reference (a): Closeout of IE Bulletin 81-03 (b):
Supplemental Response to IE Bulletin 81-03, dated July 30, 1982 B. J. Christel to T. J. Rausch (c):
Supplemental Response to IE Bulletin 81-03; d&ted March 11, 1983, L. J. Turnquest to E. D. Swartz (d):
Supplemental Information on Activities Related to IE Bulletin 81-03 dated June 10, 1985, C. L. Alexander to
Dear Mr. Denton:
As identified in Reference (d) Dresden has completed the conunitments to I.E.Bulletin 81-03.
However, Reference (d) also states, on page 3. " Ac an extra precaution, the LPCI/CCSW Heat Exchangers, CCSW Vault Room Coolers, and LPCI/ Core Spray Room Coolers are being equipped with pressure gauges and/or flow reversal capability as their utilization of servie water may reedit in significant clam problems." The LPCI/CCSW Heat Exchangers have been equipped with inlet and outlet pressure gauges and the CCSW Vault Room Coolers have/will be equipped with pressure gauges and flow reve: sal capability.
However, because 1) the LPCI/ Core Spray Room Coolers have not experienced plugging in the past, 2) during routine survelliance the temperature of air being discharged is checked, and 3) the cost to modify the system does not justify the added data provided to anticipate room cooler plugging, neither pressure gauges nor reversing capability will be added to the LPCI/ Core Spray
. Room Coolers.
One original and fif teen copies are being provided for your use.
Sincerely.
s Creg exande Nuclear Licensing Administrator cc:
J.,C. Keppler Resident Inspectors 1479K B6040iO150 BM PDR ADOCK 0S000 37
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