05000255/LER-2007-003, Cancellation of Licensee Event Report 07-003, Potential for Reduced Component Cooling Water Cooling Capability

Cancellation of Licensee Event Report 07-003, Potential for Reduced Component Cooling Water Cooling Capability

ML072610182
Person / Time
Site:	Palisades
Issue date:	09/14/2007
From:	Schwarz C Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LER 07-003-00
Download: ML072610182 (2)

LER-2007-003, Cancellation of Licensee Event Report 07-003, Potential for Reduced Component Cooling Water Cooling Capability

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat
2552007003R00 - NRC Website

text

Entergy Nuclear Operations, Inc.

Palisades Nuclear Plant 27780 Blue Star Memorial Highway Covert, MI 49043 September 14, 2007 10 CFR 50.73 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Palisades Nuclear Plant Docket 50-255 License No. DPR-20 Cancellation of Licensee Event Report 07-003, Potential for Reduced Component Cooling Water Cooling Capabilitv

Dear Sir or Madam:

By letter dated April 25, 2007, Entergy Nuclear Operations, Inc. transmitted Palisades Nuclear Plant Licensee Event Report (LER)07-003, "Potential For Reduced Component Cooling Water Cooling Capability." The LER described the potential effects on the component cooling water (CCW) system from radiant heat damage to associated equipment cable jackets. Specifically, the LER described a combination of two postulated cable faults which could result in the inoperability of CV-0823, CCW Heat Exchanger Service Water Outlet Valve, and P-52B, CCW Pump, causing a condition in which there would be less than 100% of the required post-accident CCW cooling. The occurrence was reported in accordance with 10 CFR 50.73(a)(2)(v)(B) as a condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to remove residual heat.

Subsequent evaluation of past operability concluded that these cables would not have failed as conservatively postulated in LER 07-003, and are considered to have been operable. This conclusion was based, in part, on accident simulation testing of the removed cables, which showed acceptable results.

Since the cables were not inoperable, as was previously reported in LER 07-003, there was no condition that could have prevented the fulfillment of the safety function of structures or systems needed to remove residual heat. Consequently, the reporting criterion of 10 CFR 50.73(a)(2)(v)(B) is not applicable. Therefore, LER 07-003 is being canceled.

Document Control Desk Page 2 Summarv of Commitments This letter contains no new commitments and no revision to existing commitments.

Site vice President Palisades Nuclear Plant CC Administrator, Region Ill, USNRC Project Manager, Palisades, USNRC Resident Inspector, Palisades, USNRC