05000341/LER-2002-001, Re HPCI and RCIC Room Area Temperature Switches Beyond TS Allowable Value
| ML021350230 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 05/06/2002 |
| From: | O'Connor W Detroit Edison |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NRC-02-0029 LER-02-001-00 | |
| Download: ML021350230 (7) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3412002001R00 - NRC Website | |
text
Willian T. O'Connor, Jr.
Vice President, Nuclear Generation Fermi 2 6400 North Dixie Hwy., Newport, Michigan 48166 Tel: 734.586.6201 Fax: 734.686.4172 Detroit Edison A DTEEnergy Company 10CFR50.73 May 6, 2002 NRC-02-0029 U S Nuclear Regulatory Commission Attention: Document Control Desk Washington DC 20555
Reference:
Fermi 2 NRC Docket No. 50-341 NRC License No. NPF-43
Subject:
Licensee Event Report (LER) No.02-001 Pursuant to 10 CFR 50.73(a)(2)(i)(B), Detroit Edison is submitting the enclosed LER No.02-001. This LER documents the setpoints of the primary containment isolation instrumentation Division I HPCI and RCIC equipment room high temperature setpoints exceeding the Technical Specification allowable value.
No commitments are being made in this LER.
Should you have any questions or require additional information, please contact Mr. Norman K. Peterson of my staff at (734) 586-4258.
Sincerely,
{W'Q&As GS cc:
T. J. Kim M. A. Ring M. V. Yudasz, Jr.
NRC Resident Office Region III Regional Administrator, Region III Wayne County Emergency Management Division 1-\\
/I
USNRC NRC-02-0029 Page 2 bcc:
G. D. Cerullo D. K. Cobb B. P. Fisher R. W. Libra D. J. Noetzel W. T. O'Connor, Jr.
S. R. Peterman N. K. Peterson L. D. Sanders S. Stasek Electronic Licensing Library (ELL) (200 TAC)
Information Management (140 NOC)
Michigan Department of Environmental Quality Radiological Protection Section NSRG Secretary/ISEG Coordinator (220 TAC)
NRR Chron File OSRO Secretary [240 OBA]
J. A. Tibai
Abstract
On March 8, 2002, at approximately 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br />, technicians (utility, non-licensed) performing a Channel Functional Test on Division I High Pressure Coolant Injection (HPCI) and Reactor Core Isolation Cooling (RCIC) Room Area High Temperature switches (E41N602A and E51N602A) found the temperature switch setpoint to be set above the Technical Specification (TS) allowable value. The cause of the temperature switches being set beyond TS allowable values was found to be a loose battery connection in a test instrument.
HPCI and RCIC room area temperature isolation is provided to detect a small leak from the associated HPCI or RCIC system steam piping. The isolation is diverse from the steam line high flow instrumentation. The Division I HPCI and RCIC room area temperature isolation channels would have functioned at a slightly higher setpoint. During the time the Division I temperature switch setpoints were incorrect the Division II HPCI and RCIC room area temperature isolation channels were available, except during their Channel Functional Test. There was no condition that would have prevented an isolation from occurring. The room area high temperature isolation functions are not assumed in any UFSAR transient or accident analysis.
Division II temperature switch setpoints were verified to be correct and Division I temperature switches were immediately adjusted to within their required setpoints. Corrective actions being considered are to add verification steps to procedures and include lessons learned into the Maintenance Initial and Continuing Training Program.
NRC FORM 366 (7-2001)
(If more space is required, use additional copies of (if more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A)
Corrective Actions
Upon discovery of the misadjustment on March 8, 2002, the Division I temperature switches E41N602A and E5 IN602A were immediately adjusted to within their required setpoints.
The Division I and II HPCI and RCIC room area temperature switch setpoints are verified/adjusted once each quarter. A review of the past two-year instrument setpoint verification history showed that the Division I temperature switches had required no adjustment during that time. It was discovered the setpoints of Division I temperature switches E4 1 N602A and E5 1 N602A had been found out of tolerance while performing surveillance 44.020.227 in December, 2001. The as found voltage measured was 1.841 mV for instrument E41N602A and 1.854 mV for instrument E51N602A. This is approximately 1 mV (30%) lower than the expected value. Since there were no indications of equipment failure, the temperature switches were adjusted higher by approximately 1 mV and the surveillance was completed. The as found discrepancies were documented, but not listed as a discrepancy.
This event has been documented in the Fermi 2 corrective action program as CARD 02-13570. The corrective actions will be tracked and implemented with the established processes and priorities of the program.
Additional corrective actions may include revision of surveillances to verify setpoint temperatures before and after adjustments are made, physical repairs to the Thrice-Cell carrying case, and including lessons learned into the Maintenance Initial and Continuing Training Program.
Additional Information
A. Failed Components - None B. Previous LERs On Similar Problems-No similar failures were found.
RG FORM 366A (7-2001