05000133/LER-2005-001, Regarding Missing In-core Detectors
| ML050610543 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 02/22/2005 |
| From: | Rueger G Pacific Gas & Electric Co |
| To: | Document Control Desk, NRC/FSME |
| References | |
| HBL-05-002, OL-DPR-07 LER 05-001-00 | |
| Download: ML050610543 (2) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat |
| 1332005001R00 - NRC Website | |
text
Pacific Gas and Electric Company,.
Gregory M. Rueger US Maut Senior Vice President-Mail Code B32 Generation and Pacific Gas and Electric Company Chief Nuclear Officer PO Box 770000 February 22, 2005 San Francisco, CA 94177.0001 Overnight Mail:
Mail Code B32 PG&E Letter HBL-05-002 Pacific Gas and Electric Company 77 Beale Street, 32nd Floor San Francisco. CA 94105-1814 U.S. Nuclear Regulatory Commission 415.973.4684 ATTN: Document Control Desk Fax: 415.973 2313 Washington, DC 20555-0001 Docket No. 50-133, OL-DPR-7 Humboldt Bay Power Plant, Unit 3 Licensee Event Report 2005-001-00 Missing In-core Detectors
Dear Commissioners and Staff:
In accordance with 10 CFR 20.2201(b)(1), PG&E is submitting the enclosed licensee event report (LER) 2005-001-00, regarding missing in-core detectors in the spent fuel pool (SFP) at the Humboldt Bay Power Plant (HBPP). The LER is being submitted to inform the NRC in a timely manner of the finding. A revision to the LER, including the details required to be reported in accordance with 10 CFR 20.2201(b)(1), including the cause analysis, will be submitted by June 30, 2005. This event does not adversely affect the health and safety of the public or plant workers.
Sin cerely, S' I Gr go M. Rueger Enclosure cc:
Emilio M. Garcia John B. Hickman Bruce S. Mallett PG Fossil Gen HBPP Humboldt Distribution
e.
0 NRC FOR-1 366 US. NUCLEAR REGULATORY CO3MIlSSIOX APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/30/2007 (62004)
Estimated burden per response to conmply with this mandatory collection request 5S hours. Reported lessons ]earned are incorporated into the licensing process and fed back to industry. Send cormnents regarding burden estimate to the Records and FOIA/Privacy Service Branch Cr-s F52), U.S. Nuclear Regulatory Commission, LICENSEE EVENT REPORT (LER)
Washington, DC 20555-0001 or by internet e-mail to infocollects.nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs. NEOB-10202, (3150-0104). Office of'Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB control (See reverse for required number of number, the NRC may not conduct or sponsor, and a person is not required to respond digits/characters for each block) to, the information collection.
- 1. FACILITY NAMIE
- 2. DOCKET NUMBER
- 3. PAGE Humboldt Bay Power Plant Unit 3 05000133 1 OF 1
- 4. TITLE Missing In-core Detectors
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTIIER FACILITIES INVOLVED SEUNILRVFACILItY NAME DOCKET NUMIBER MONTH DAY YEAR YEAR S
EQUENTIAL R
MONTH DAY YEAR FACILITY NAME DOCKET NUMBER 02 04 2005 2005 - 001 -
00 02 22 2005
- 9. OPERATING MIODE I. TIIIS REPORT IS SUBMITTED PURSUANT TOTIIE REQUIREIMIENTS OF 10 CFR§: (Check all that apply)
ED 20.2201(b)
El 20.2203(a)(3Xi)
O 50.73(aX2)(iXC) 0 50.73(a)(2)(vii)
N/A 0 20.2201(d)
Dl 20.2203(a)(3)(ii) al 50.73(a)(2)(ii)(A)
El 50.73(a)(2)(viiiXA) 0 20.2203(aXl) 0 20.2203(a)(4) 0 50.73(a)(2)(ii)(B)
El 50.73(a)(2)(viiiXB) 0 20.2 203(aX2Xi)
El 50.36(c)(1)(iXA)
[I 50.73(aX2Xiii) 0 50.73(a)(2XixXA)
- 10. POWER LEVEL 0 20.2203(aX2Xii)
[I 50.36(cXlXii)(A)
E 50.73(aX2Xiv)(A)
El 50.73(aX2Xx)
El 20.2203(aX2)(iii) 0 50.36(cX2) 0 50.73(aX2)(v)(A)
El 73.71(aX4)
O 20.2203(a)(2)(iv)
El 50.46(aX3Xii)
El 50.73(a)(2)(v)(B) 0 73.71(a)(5) 0 0 20.2203(a)(2)(v) 03 50.73(aX2)(iXA) 0 50.73(a)(2Xv)(C) 0 OTHER O 20.2203(a)(2Xvi) 0 50.73(a)(2)(iXB) 0 50.73(a)(2XvXD)
Specify in Abstract below or in NRC Form 366A
- 12. LICENSEE CONTACT FOR TIllS LER FACILITY NAME TELEPHONE NUMBER (Include Area Code)
David Sokolsky - Senior Regulatory Services Engineer (707) 444-0801CAUSE SYSTEM COMPONENT MANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU REPORTABLE NAjFACTURER TO EPIX FACTURER TO EPIX N/A lll l
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH DAY YEAR SUBMISSION [X] YES (Jfyes. complete 15. EXPECTED SUBMISSIONDATE)
DATE 06 30 2005 ABSTRACT (Limit to 1400 spaces. Le., approximately 15 single-spaced t)pewritten lines)
During an investigation regarding the location of three 18-inch fuel rod segments cut from assembly A-49 (refer to PG&E Letter HBL-04-026 submitted to the NRC on November 19, 2004), Humboldt Bay Power Plant (HBPP) personnel identified missing in-core detectors. In-core detectors contain non-fuel special nuclear material (SNM) and were used inside in-core assemblies to measure reactor power level during plant operations. Each in-core detector is approximately 2-1/2 inches long, containing approximately 0.04 grams to slightly less than 0.002 grams of U235. HBPP records indicate 54 in-core detectors should be in the spent fuel pool, but HBPP personnel have been able to locate and positively identify 50 complete and three partial in-core detectors. On February 4, 2005, HBPP personnel determined that not all 54 in-core detectors could be located and notified the NRC.
The physical search for in-core detectors is complete. HBPP personnel are reviewing documents to provide the details required to be reported in accordance with 10 CFR 20.2201(b)(1). A supplemental LER will be issued to provide those details and to report the root cause and corrective actions. Most probable locations for the missing in-core detectors are licensed, monitored and restricted radiological control areas; therefore, this event does not adversely affect the public health and safety.
NRC FORM 366 (6-2004)
PRINTED ON RECYCLED PAPER NRC FORM~ 366 (6-2004)
PRINTED ON RECYCLED PAPER