05000461/LER-2011-005, Regarding Missed Surveillance Due to Preconditioning Valve Prior to Leak Rate Test

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Regarding Missed Surveillance Due to Preconditioning Valve Prior to Leak Rate Test
ML12039A158
Person / Time
Site: Clinton 
Issue date: 01/24/2012
From: Noll W
Exelon Nuclear
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
U-604050 LER 11-005-00
Download: ML12039A158 (4)


LER-2011-005, Regarding Missed Surveillance Due to Preconditioning Valve Prior to Leak Rate Test
Event date:
Report date:
Reporting criterion: 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

10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
4612011005R00 - NRC Website

text

Exelkn.

Nuclear Clinton Power Station 8401 Power Road Clinton, IL 61727 U-604050 10 CFR 50.73 January 24, 2012 SRRS 5A.108 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Clinton Power Station, Unit 1 Facility Operating License No. NPF-62 NRC Docket No. 50-461

Subject:

Licensee Event Report 2011-005-00 Enclosed is Licensee Event Report (LER) No. 2011-005-00: Missed Surveillance Due To Preconditioning Valve Prior To Leak Rate. This report is being submitted in accordance with the requirements of 10 CFR 50.73.

There are no regulatory commitments contained in this report.

Should you have any questions concerning this report, please contact A. Khanifar, at (217) 937-3800.

Respectfully, William G. Noll Site Vice President Clinton Power Station RSF/blf

Enclosure:

Licensee Event Report 2011-005-00 cc:

Regional Administrator - NRC Region III NRC Senior Resident Inspector - Clinton Power Station Office of Nuclear Facility Safety - IEMA Division of Nuclear Safety

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2013 (10-2010)

, the NRC may sfor each block) not conduct or sponsor, and a person is not required to respond to, the digits/characters finformation collection.

13. PAGE Clinton Power Station, Unit 1 05000461 1 OF 3
4. TITLE Missed Surveillance Due To Preconditioning Valve Prior To Leak Rate Test
5. EVENT DATE
6. LER NUMBER
7. REPORT DATE
8. OTHER FACILITIES INVOLVED FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR EQUENTIAL REV MONTH DAY YEAR N/A N/A js NUMBER INO.

FACILITY NAME DOCKET NUMBER 12 01 2011 2011 005 -

00 01 24 2012 N/A N/A

9. OPERATING MODE
11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply)

El 20.2201(b)

El 20.2203(a)(3)(i)

El 50.73(a)(2)(i)(C)

El 50.73(a)(2)(vii)

El 20.2201(d)

[] 20.2203(a)(3)(ii)

El 50.73(a)(2)(ii)(A)

El 50.73(a)(2)(viii)(A)

El 20.2203(a)(1)

El 20.2203(a)(4)

El 50.73(a)(2)(ii)(B)

El 50.73(a)(2)(viii)(B)

E] 20.2203(a)(2)(i)

El 50.36(c)(1)(i)(A)

[I 50.73(a)(2)(iii)

[I 50.73(a)(2)(ix)(A)

10. POWER LEVEL El 20.2203(a)(2)(ii)

[I 50.36(c)(1)(ii)(A)

El 50.73(a)(2)(iv)(A)

El 50.73(a)(2)(x)

El 20.2203(a)(2)(iii)

[E 50.36(c)(2)

[E 50.73(a)(2)(v)(A)

El 73.71 (a)(4) 000

[] 20.2203(a)(2)(iv)

El 50.46(a)(3)(ii)

El 50.73(a)(2)(v)(B)

El 73.71 (a)(5)

El 20.2203(a)(2)(v)

El 50.73(a)(2)(i)(A)

El 50.73(a)(2)(v)(C)

El OTHER El 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B)

El 50.73(a)(2)(v)(D)

Specify in Abstract below or in Issue Reports 1300655 and 1310612 were initiated to investigate this event.

C. CAUSE OF EVENT

Test procedure CPS 9861.05D010 was inadequate and incorrectly required valve 1E51-F040 to be manually stroked prior to performing the LLRT as a step in establishing the test lineup.

D. SAFETY CONSEQUENCES

There were no actual consequences for this event. An analysis concluded that there was reasonable assurance check valve 1 E51-F040 would have performed its design function to isolate the primary containment penetration.

Additionally, the as-found LLRT for the redundant motor-operated valve (MOV) for this containment penetration was completed with satisfactory results and thus the MOV was capable of completing the safety function to isolate the primary containment penetration.

No loss of safety function occurred during this event.

E.

CORRECTIVE ACTIONS

Procedure CPS 9861.05D01 0 is being revised to clarify stroking requirements for valve 1 E51 -F040.

Other similar Appendix J check valve test procedures are being reviewed to determine the extent of this condition.

F. PREVIOUS OCCURRENCES

A search of Issue Reports for the last five years did not identify previous similar events of unacceptable preconditioning for LLRTs.

G. COMPONENT FAILURE DATA

None