05000389/LER-2013-005, Regarding Unanalyzed Condition Affecting Emergency Diesel Generators

Regarding Unanalyzed Condition Affecting Emergency Diesel Generators

ML14057A452
Person / Time
Site:	Saint Lucie
Issue date:	02/18/2014
From:	Jensen J Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2014-047 LER 13-005-00
Download: ML14057A452 (4)

LER-2013-005, Regarding Unanalyzed Condition Affecting Emergency Diesel Generators

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 10 CFR 50.73(a)(2)(ii)
3892013005R00 - NRC Website

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February 18, 2014 L-2014-047 10 CFR 50.73 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Re:

St. Lucie Unit 2 Docket No. 50-389 Reportable Event: 2013-005-00 Date of Event: December 19, 2013 Unanalyzed Condition Affecting Emergency Diesel Generators The attached Licensee Event Report 2013-005-00 is being submitted pursuant to the requirements of 10 CFR 50.73 to provide notification of the subject event.

Very triuly yours, Joseph N. Jensen Site Vice President St. Lucie Plant JJ/rcs Attachment Florida Power & Light Company 6501 S. Ocean Drive, Jensen Beach, FL 34957

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 1131/2017 (02-2014)

Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.

u,,," *,,Reported lessons learned are incorporated Into the licensing process and fed back to industry.

--Send comments regarding burden estimate to the FOIA, Privacy and Information Collections Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by internet e-mail to infocollects.resourse@nrc.gov, and to the Desk Officer, Office of Information LICENSEE EVENT REPORT (LER) ard Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. It a means used to impose an information collection does not display a currenty valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

3. PAGE St. Lucie Unit 2 05000389 1 OF 3

4. TITLE Unanalyzed Condition Affecting Emergency Diesel Generators

5. EVENT DATE

6. LER NUMBER

17. REPORT DATE

18. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL ý REV M

DAY I IFACILITY NAME DOCKET NUMBER MONTH~

~

DAIER YA NUMBER NO.

DA1ERN 12 19 2013 2013 -

005 -

00 t 02 18 2014 FACILITY NAME NA DOCKET NUMBER

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

[I 20.2201(b)

[I 20.2203(a)(3)(i)

Dl 50.73(a)(2)(i)(C)

E] 50.73(a)(2)(vii) 1 El 20.2201(d)

El 20.2203(a)(3)(ii)

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

El 50.73(a)(2)(viii)(A) 0l 20.2203(a)(1)

El 20.2203(a)(4) 0 50.73(a)(2)(ii)(B) l 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)

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

10. POWER LEVEL 0

20.2203(a)(2)(ii)

E] 50.36(c)(1)(ii)(A)

E-50.73(a)(2)(iv)(A)

El 50.73(a)(2)(x)

[I 20.2203(a)(2)(iii)

El 50.36(c)(2) 0 50.73(a)(2)(v)(A)

E] 73.71(a)(4)

El 20.2203(a)(2)(iv)

El 50.46(a)(3)(ii)

[I 50.73(a)(2)(v)(B)

El 73.71(a)(5) 100%

E] 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)

El 50.73(a)(2)(i)(B)

[

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

Specify in Abstract below or in The currently installed compensatory measures will provide a temporary wind barrier to mitigate wind speeds up to 74 mph.

In the unlikely event that hurricane force winds (i.e.,

greater than 74 mph) are experienced from the wind direction 32 to 92 degrees or from 212 to 272 degrees, entering the applicable sections of the Technical Specifications (3.8.1.1 for Modes 1 through 4 or 3.8.1.2 for Modes 5 and

6) will be required.

The EDGs are considered operable but degraded below full qualification.

The sustained winds that are adverse to EDG radiator heat transfer are normally associated with tropical storms and hurricanes.

Developing weather patterns that could produce tropical storms or hurricanes are predictable and slow moving.

This allows ample time to prepare for high wind conditions.

This licensee event report is being reported in accordance with 10 CFR 50.73(a) (2) (ii)

(B) as a condition that resulted in the nuclear power plant being in an unanalyzed condition that significantly degraded plant safety.

Had these sustained winds been experienced at the EDGs without the currently installed compensatory measures, this condition could have prevented the fulfillment of a safety function.

Therefore, this event is also reportable pursuant to 10 CFR 50.73 (a) (2) (v) (A)

& (D).

This event had no effect on the health and safety of the public.

During this period other sources of emergency AC power were available through the 1A and 1B EDGs.

Corrective Actions

Temporary wind barriers have been installed as compensatory measures to reduce the potential for sustained winds to adversely impact the Unit 2 EDG radiator fan performance.

The corrective action listed below has been entered into the site corrective action program.

Any changes to the action will be managed under the corrective action program.

1. To correct the problem, a permanent wind deflector is being installed to direct the radiator fan discharge flow vert'ically to restore full design qualification of the EDGs.

Failed Component(s)

None Manufacturer Engine Systems, Inc.

is the Emergency Diesel Generator supplier.