05000368/LER-2004-002, Unit 2, Regarding Operation Prohibited by Technical Specification Due to an Inoperable Containment Cooling Fan Resulting from the Failure to Perform an Adequate Verification and Post-Maintenance Test
| ML043360166 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 11/29/2004 |
| From: | Boyd D, James D Entergy Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 2CAN110401 LER 04-002-00 | |
| Download: ML043360166 (9) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 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)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function |
| 3682004002R00 - NRC Website | |
text
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-- Enterg Entergy Operations, Inc.
1448 S. R. 333 Russellville, AR 72802 Tel 501 8585000 2CAN 110401 November 29, 2004 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Licensee Event Report 50-368/2004-002-00 Arkansas Nuclear One - Unit 2 Docket No. 50-368 License No. NPF-6
Dear Sir or Madam:
In accordance with 10CFR50.73(a)(2)(i)(B), enclosed is the subject report concerning operation prohibited by technical specifications due to an inoperable containment cooling fan.
New commitments contained in this submittal are summarized in Attachment 1.
Sincerely, 4r Dale E. James Manager, Licensing DEJ/dh attachment enclosure
2CAN1 10401 Page 2 cc:
Dr. Bruce S. Mallett Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310 London, AR 72847 Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, GA 30339-5957 LEREvents@inpo.org
Attachment I 2CAN110401 List of Regulatory Commitments to 2CAN1 10401 Page 1 of 1 List of Regulatory Commitments The following table identifies those actions committed to by Entergy in this document.
Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.
Check One SCHEDULED ONE-
)
COMPLETION TIME CONTINUING DATE
COMMITMENT
ACTION COMPLIANCE (If Required)
Maintenance surveillance tests that X
Prior to refueling have the potential to render safety-outage 2R17 related equipment inoperable will be reviewed and the model work orders for these activities will be revised to incorporate guidance for the performance of adequate post-maintenance testing.
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/30/2007 (6-2004)
, the NRC maynotconduct digits/characters for each block) or sponsor, and a person Is not required to respond to, the Information
- 3. PAGE Arkansas Nuclear One - Unit 2 05000 36 1 OF 5
- 4. TITLE Operation Prohibited by Technical Specification due to an Inoperable Containment Cooling Fan Resulting from the Failure to Perform an Adequate Verification and Post-Maintenance Test
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED SEI ETIL E
FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SENUENTIAL REV MONTH DAY YEAR 05000 FACILITY NAME DOCKET NUMBER 09 29 2004 2004
- - 002 -
00 I1 29 2004 05000
- 9. OPERATING MODE
- 11. THIS REPORTIS SUBMITTED PURSUANTTOTHE REQUIREMENTS OF 10 CFR§: (Checkallthatapply) o 20.2201(b)
El 20.2203(a)(3)(i)
El 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii) 4 El 20.2201(d)
El 20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A) 0 50.73(a)(2)(viii)(A) o 20.2203(a)(1)
El 20.2203(a)(4)
El 50.73(a)(2)(ii)(B)
El 50.73(a)(2)(viii)(B)
- o 20.2203(a)(2)(i) a 50.36(c)(1)(i)(A)
El 50.73(a)(2)(iii)
El 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2)(ii)
E 50.36(c)(1)(ii)(A)
El 50.73(a)(2)(iv)(A)
El 50.73(a)(2)(x)
E 20.2203(a)(2)(iii)
E 50.36(c)(2)
El 50.73(a)(2)(v)(A)
El 73.71(a)(4)
E 20.2205(a)(2)(iv)
E 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B) al 73.71(a)(5) 000 El 20.2203(a)(2)(v)
E 50.73(a)(2)(i)(A)
El 50.73(a)(2)(v)(C)
El OTHER El 20.2203(a)(2)(vi)
ED 50.73(a)(2)(i)(B)
E 50.73(a)(2)(v)(D)
Specify In Abstract below or In NRC Formn 366A
- 12. LICENSEE CONTACT FOR THIS LER FACILITY NAME TELEPHONE NUMBER (indude Area Code)
Arkansas Nuclear One / Dee Hawkins 479-858-5589CAUSE SYSTEM COMPONENT MANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE CAUSSYTEMOMPNE J FACTURER TO EPIX FACTURER TO EPIX
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH DAY YEAR SUBMISSION El YES (If'yes, complete 15. EXPECTED SUBMISSION DATE) 0 NO DATE ABSTRACT (Limit to 1400 spaces, l.e, approximately 15 single-spaced typewritten lines)
On October 3, 2003, during a scheduled refueling outage, a containment cooling fan circuit breaker was tested and inspected, Inspection of the breaker required it to be de-terminated and removed from its cubicle. When the breaker was placed back in its cubicle, two of the motor leads were incorrectly terminated. The failure to perform an adequate verification and a post-maintenance test (PMT) following maintenance activities on the breaker resulted in a technical specification required containment cooling fan being left in an inoperable condition. Due to changing plant conditions following the refueling outage, and the normal rotation of containment cooling fans, the abnormal rise in containment temperature was not positively correlated to 2VSF-IB operation until the fan was placed in service in March 2004. At that time, an inaccurate operability evaluation determined that VSF-1B remained operable. On September 29, 2004, during an online containment entry, 2VFS-1B was found to be rotating in the reverse direction. The motor leads were correctly terminated in the circuit breaker and a PMT was satisfactorily completed, confirming fan motor rotation to be in the correct direction. A maintenance action plan has been implemented to provide guidance regarding self-checking and second-person verification. In addition, maintenance surveillance tests that have the potential to render safety-related equipment inoperable will be reviewed and the model work orders for these activities will be revised to incorporate guidance for the performance of adequate post-maintenance testing.
NRC FORM 366 (6 2004)
PRINTED ON RECYCLED PAPER
(If more space is required, use additonal 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) single failure of a component of either system will not prevent the fulfillment of this function.
In addition, each train of the containment cooling system is designed to exceed the heat removal capacity assumed in the ANO-2 safety analysis; therefore, the unavailability of one containment cooling fan was determined to have minimal safety significance.
F.
Basis for Reportability This report of operation prohibited by TS is submitted in accordance with 1 OCFR50.73(a)(2)(i)(B).
G.
Additional Information
There have been no previous similar events reported by ANO as Licensee Event Reports.
Energy Industry Identification Systems (EIIS) are identified in the text as [XX].