ML032260529
| ML032260529 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/31/2003 |
| From: | Hopkins L Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NMP1L 1753 | |
| Download: ML032260529 (2) | |
Text
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- P.O.Box63:
-Lycorning, New York 13093 Constalaon, Energy Group Nine Mile Point l 31= 2003 Nuclear Station July 31, 2003 NMIPL 1753 U.-S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
SUBJECT:
Nine Mile Point Unit 1 Docket No. 50-220 Facility Operating License No. DPR-63 Special ReportChannel #1 i Containment Hydrogen Monitoring System Inoperable for Containment Airborne Activity Monitor Surveillance Testing Gentlemen:
Nine Mile Point Nuclear Station, LLC is submitting the following Special Report for Nine Mile Point Unit 1 (NMP1)concerning the inoperability of Channel #11 Containment Hydrogen Monitoring System (CBMS). This submittal is in accordance with Action Statement 4.a of Table 3.6.11-2, "Accident Monitoring Instrumentation Action Statements," of the NMP1 Technical Specifications.
Description ofEvent On July 22, 2003, at approximately 0654 hours0.00757 days <br />0.182 hours <br />0.00108 weeks <br />2.48847e-4 months <br />, operators declared Channel -#II CHMS inoperable in order to ilw-o peffbrniroNI13D;systems
-Integrity Helium Leak Rate Test," onXheontaiment Airborne Activity Monitor (CAM)
System. Channel-#l1 of-the CHMS shares a'common sample stream returnline with the CAM system. -The performance-of Nl-ISP-201-530 required the shared sample stream return line isolation valves to be closed, thereby causing Channel #11 CHMS to be inoperable. After completion ofN1-ISP-201-530, Channel #11 CHMS was returned to service at approximately. 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br /> on July 22,j2003.:
The redundant Channel #12 CHMS was verified in service prior to removing Channel
- 11 from service.
Page 2 NMP1L 1753 Cause of Event The Channel #11 CHMS was declared inoperable in order to perform surveillance testing on the interfacing CAM system.
Corrective Actions The surveillance testing on the CAM system was completed and Channel #11 CHMS was rettn
- FeaIe Ms.
edurationo0inopera 1iityrwas-lpproximate y hours.
Very truly yours, Lawrence A. opkins Plant General Manager LAH/KLE /jm cc:
Mr. H. J. Miller, NRC Regional Administrator, Region I Mr. G. K Hunegs, NRC Senior Resident Inspector