05000423/LER-2014-002, Regarding DC Circuit Hot Shorts

Regarding DC Circuit Hot Shorts

ML14129A464
Person / Time
Site:	Millstone
Issue date:	05/05/2014
From:	Scace S Dominion Nuclear Connecticut
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
14-185 LER 14-002-00
Download: ML14129A464 (6)

LER-2014-002, Regarding DC Circuit Hot Shorts

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 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)(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
LER closed by
IR 05000245/2016008 (4 January 2017)
4232014002R00 - NRC Website

text

Dominion Dominion Nuclear Connecticut, Inc.

Rope Ferry Rd., Waterford, CT 06385 Mailing Address: P.O. Box 128 Waterford, CT 06385 dorn.corn MAY 0 5 2014 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Serial No.

MPS Lic/LES Docket No.

License No.14-185 RO 50-423 NPF-49 DOMINION NUCLEAR CONNECTICUT. INC.

MILLSTONE POWER STATION UNIT 3 LICENSEE EVENT REPORT 2014-002-00 DC CIRCUIT HOT SHORTS This letter forwards Licensee Event Report (LER) 2014-002-00 documenting a condition at Millstone Power Station Unit 3 on March 12, 2014. This LER is being submitted pursuant to 10 CFR 50.73(a)(2)(ii)(B).

If you have any questions or require additional information, please contact Mr. William D. Bartron at (860) 444-4301.

Sincerely, e-a CCL

/Steph ac Site Vice President - Millstone Attachments: 1 Commitments made in this letter: None

Serial No.14-185 Docket No. 50-423 Licensee Event Report 2014-002-00 Page 2 of 2 cc:

U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd, Suite 100 King of Prussia, PA 19406-2713 M. C. Thadani NRC Project Manager Millstone Units 2 and 3 U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 B-1 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station

Serial No.14-185 Docket No. 50-423 Licensee Event Report 2014-002-00 ATTACHMENT LICENSEE EVENT REPORT 2014-002-00 DC CIRCUIT HOT SHORTS MILLSTONE POWER STATION UNIT 3 DOMINION NUCLEAR CONNECTICUT, INC.

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 01/3112017 (02-2014)

(02

,20

,,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 />.

I.,"

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 LICENSEE EBranch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by EEVENTREPORT (LER) intemet e-mail to lnfocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and (See Page 2 for required number of 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 digits/characters for each block) control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

3. PAGE Millstone Power Station Unit 3 05000423 1 OF 3

4. TITLE DC Circuit Hot Shorts

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY FACILITY NAME DOCKET NUMER NUMBER NO.

05000 FACILITY NAME DOCKET NUMBER 03 12 2014 2014-002 00 05 05 2014 05000

9. OPERATING MODE

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Checkall thatapply)

[

20.2201(b) fl 20.2203(a)(3)(i) 50.73(a)(2)(i)(C)

[]

50.73(a)(2)(vii)

EJ_20.2201(d)

[

20.2203(a)(3)(ii)

E 50.73(a)(2)(ii)(A)

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

EZ 20.2203(a)(1)

[

20.2203(a)(4)

[

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

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

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

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

El 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)

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

El 50.73(a)(2)(x)

El 20.2203(a)(2)(iii)

El 50.36(c)(2)

EL 50.73(a)(2)(v)(A)

E] 73.71(a)(4) 0l 20.2203(a)(2)(iv)

[]

50.46(a)(3)(ii)

L-50.73(a)(2)(v)(B)

E] 73.71(a)(5) 0] 20.2203(a)(2)(v)

E] 50.73(a)(2)(i)(A)

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

E] OTHER

[]

20.2203(a)(2)(vi)

U] 50.73(a)(2)(i)(B)

U] 50.73(a)(2)(v)(D)

Specify in Abstract below or in I_ E__

___________________________2)(v))

4. CORRECTIVE ACTION (Continued)

Additional corrective actions are being taken in accordance with the Station's corrective action program.

5. PREVIOUS OCCURRENCES

None.

6. ENERGY INDUSTRY IDENTIFICATION SYSTEM (EIIS) CODES 125V DC [EI/EJ]

DC Circuits [11]