05000400/LER-2015-005, Regarding Unrecognized Impact of Opening of Barrier Doors on High Energy Line Break Analysis

Regarding Unrecognized Impact of Opening of Barrier Doors on High Energy Line Break Analysis

ML15230A007
Person / Time
Site:	Harris
Issue date:	08/17/2015
From:	Waldrep B Duke Energy Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
HNP-15-069 LER 15-005-00
Download: ML15230A007 (6)

LER-2015-005, Regarding Unrecognized Impact of Opening of Barrier Doors on High Energy Line Break Analysis

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
4002015005R00 - NRC Website

text

Benjamin C. Waldrep Vice President Harris Nuclear Plant 5413 Shearon Harris Road New Hill NC 27562-9300 919.362.2000 10 CFR 50.73 August 17, 2015 Serial: HNP-15-069 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Subject: Licensee Event Report 2015-005-00 Ladies and Gentlemen:

Duke Energy Progress, Inc. submits the enclosed Licensee Event Report 2015-005-00 in accordance with 10 CFR 50.73 for Shearon Harris Nuclear Power Plant, Unit 1. This report describes a condition where high energy line break doors were blocked open between the Main Steam Tunnel and the Reactor Auxiliary Building under administrative controls to support maintenance, resulting in the plant being in an unanalyzed condition that could have prevented fulfillment of a safety function. The doors were closed and restrictions were put in place to prevent the condition from occurring again in the future.

This document contains no regulatory commitments. Please refer any questions regarding this submittal to John Caves at (919) 362-2406.

Sincerely, Benjamin C. Waldrep Enclosure: Licensee Event Report 2015-005-00 cc:

Mr. J. D. Austin, NRC Sr. Resident Inspector, HNP Ms. M. Barillas, NRC Project Manager, HNP Mr. V. M. McCree, NRC Regional Administrator, Region II

Benjamin C. Waldrep Vice President Harris Nuclear Plant 5413 Shearon Harris Road New Hill NC 27562-9300 919.362.2000 10 CFR 50.73 August 17, 2015 Serial: HNP-15-069 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Subject: Licensee Event Report 2015-005-00 Ladies and Gentlemen:

Duke Energy Progress, Inc. submits the enclosed Licensee Event Report 2015-005-00 in accordance with 10 CFR 50.73 for Shearon Harris Nuclear Power Plant, Unit 1. This report describes a condition where high energy line break doors were blocked open between the Main Steam Tunnel and the Reactor Auxiliary Building under administrative controls to support maintenance, resulting in the plant being in an unanalyzed condition that could have prevented fulfillment of a safety function. The doors were closed and restrictions were put in place to prevent the condition from occurring again in the future.

This document contains no regulatory commitments. Please refer any questions regarding this submittal to John Caves at (919) 362-2406.

Sincerely, Benjamin C. Waldrep Enclosure: Licensee Event Report 2015-005-00 cc:

Mr. J. D. Austin, NRC Sr. Resident Inspector, HNP Ms. M. Barillas, NRC Project Manager, HNP Mr. V. M. McCree, NRC Regional Administrator, Region II

NRC FORM 366 (02-2014)

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (02-2014)

LICENSEE EVENT REPORT (LER)

(See Page 2 for required number of digits/characters for each block)

APPROVED BY OMB: NO. 3150-0104 EXPIRES: 01/31/2017 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 />.

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.Resource@nrc.gov, and to the Desk Officer, Office of Information and 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 control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

1. FACILITY NAME Shearon Harris Nuclear Power Plant, Unit 1

2. DOCKET NUMBER 05000400

3. PAGE 1 OF 4

4. TITLE Unrecognized Impact of Opening of Barrier Doors on High Energy Line Break Analysis

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 None DOCKET NUMBER 06 16 2015 2015 -

005

- 00 08 17 2015 FACILITY NAME None DOCKET NUMBER

9. OPERATING MODE

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply) 1 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)

10. POWER LEVEL 20.2203(a)(2)(ii) 50.36(c)(1)(ii)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x) 100 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 boundaries, the flooding analysis and the HELB analysis. Access through the doors in the steam tunnel in an emergency is still allowed, but the doors must be closed upon exiting. This instruction addresses the extent of both the cause and condition for this event.

Planned Actions

1) Develop and implement an engineering change that evaluates the required passive design features to support HELB analysis and overall licensing bases. This product will identify required passive design features and establish the necessary process to ensure barriers are appropriately identified and controlled.

2) Conduct a formal briefing with HNP Engineering to communicate the importance of internalizing and maintaining a strong technical conscience when reviewing operating experience, conclusions of the root cause evaluation, and the effects of a MST HELB on RAB equipment when either D10 or D11 is blocked open.

3) Establish a new preventative maintenance frequency for doors D10 and D11 so that functional verification (opening the doors) is not required during modes 1-4. Alternatively (if necessary), provide justification for functional verification in modes 1-4 based on RIS 01-009 requirements.

PREVIOUS EVENTS There have been no related reportable events at HNP. HNP became aware of the issue on June 16, 2015.

COMMITMENTS

This report contains no regulatory commitments.