05000285/LER-2012-019-01, Regarding Traveling Screen Sluice Gates Found with Dual Indication

Regarding Traveling Screen Sluice Gates Found with Dual Indication

ML13134A393
Person / Time
Site:	Fort Calhoun
Issue date:	05/14/2013
From:	Cortopassi L Omaha Public Power District
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LIC-13-0062 LER 12-019-01
Download: ML13134A393 (6)

LER-2012-019, Regarding Traveling Screen Sluice Gates Found with Dual Indication

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 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)(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
2852012019R01 - NRC Website

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DIIIID Omaha PublicPowfIrDIBIrII:I 444 South 1(}h Street Mall Omaha, NE 68102-2247 LlC-13-0062 May 14, 2013 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Reference: Docket No. 50-285

Subject:

Licensee Event Report 2012-019, Revision 1, for the Fort Calhoun Station Please find attached Licensee Event Report 2012-019, Revision 1, dated May 14, 2013.

This report is being submitted pursuant to 10 CFR 50.73(a)(2)(v)(B).

No commitments are being made in this letter.

I If you should have any questions, please contact Terrence W. Simpkin, Manager, Site Regulatory Assurance, at (402) 533-6263.

Louis P. Cortopassi Site Vice President and CNO LPC/EPM Irjr Attachment c:

A. T. Howell, NRC Regional Administrator, Region IV L. E. Wilkins, NRC Project Manager J. M. Sebrosky, NRC Project Manager J. C. Kirkland, NRC Senior Resident Inspector Employment with Equal Opportunity

NRC FORM 366 (10-2010)

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (10-2010)

LICENSEE EVENT REPORT (LER)

(See reverse for required number of digits/characters for each block)

APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2013

, the NRC may not conduct or sp onsor, and a person is not required to respond to, th e

information collection.

1. FACILITY NAME Fort Calhoun Station

2. DOCKET NUMBER 05000285

3. PAGE 1 OF 5

4. TITLE Traveling Screen Sluice Gates Found with Dual Indication

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL NUMBER REV NO.

MONTH DAY YEAR FACILITY NAME DOCKET NUMBER 05000 08 14 2012 2012 - 019 -

1 05 14 2013 FACILITY NAME DOCKET NUMBER 05000

9. OPERATING MODE 5

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply) 20.2201(b) 20.2203(a)(3)(i) 50.73(a)(2)(i)(C) 50.73(a)(2)(vii) 20.2201(d) 20.2203(a)(3)(ii) 50.73(a)(2)(ii)(A) 50.73(a)(2)(viii)(A) 20.2203(a)(1) 20.2203(a)(4) 50.73(a)(2)(ii)(B) 50.73(a)(2)(viii)(B) 20.2203(a)(2)(i) 50.36(c)(1)(i)(A) 50.73(a)(2)(iii) 50.73(a)(2)(ix)(A) 20.2203(a)(2)(ii) 50.36(c)(1)(ii)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x) 20.2203(a)(2)(iii) 50.36(c)(2) 50.73(a)(2)(v)(A) 73.71(a)(4) 20.2203(a)(2)(iv) 50.46(a)(3)(ii) 50.73(a)(2)(v)(B) 73.71(a)(5) 20.2203(a)(2)(v) 50.73(a)(2)(i)(A) 50.73(a)(2)(v)(C)

OTHER 20.2203(a)(2)(vi) 50.73(a)(2)(i)(B) 50.73(a)(2)(v)(D)

Specify in Abstract below or in LICENSEE EVENT REPORT (LER)

CONTINUATION SHEET

2. Changes were also made to Operating Instruction CW-1, Circulating Water System Normal Operation, to address deficiencies in controlling the circulating water system during design basis conditions.

However, the changes that were made to the procedures identified in 1 and 2 above did not address the prevention of fouling during the closing function of the six external sluice gates or the changes needing to be made to Operating Instruction CW-2. Until the event in this LER (2012-019-0), fouling was corrected by issuing a flood impairment and then having divers clear the fouling. Step 4.1.3 of SO-G-124, Flood Barrier Impairment, Revision 4a, states the following:

If a degraded flood barrier is identified, a Condition Report shall be generated as required per Standing Order SO-R-2 (Condition Reporting and Corrective Action).

Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, a Flood Barrier Impairment Permit (FC-1411) shall be implemented until the degraded condition has been resolved.

None of the four remaining LERs reviewed contained the same underlying concern or reason of this event, such as the same root cause, failure, or sequence of events.