05000387/LER-2017-001, Regarding Secondary Containment Breach Due to Simultaneous Opening of Airlock Doors

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Regarding Secondary Containment Breach Due to Simultaneous Opening of Airlock Doors
ML17067A475
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 03/08/2017
From: Berryman B
Susquehanna, Talen Energy
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
PLA-7576 LER 17-001-00
Download: ML17067A475 (4)
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LER-2017-001, Regarding Secondary Containment Breach Due to Simultaneous Opening of Airlock Doors
Event date:
Report date:
Reporting criterion: 10 CFR 50.73(a)(2)(v), Loss of Safety Function
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)(i)(B), Prohibited by Technical Specifications
10 CFR 50.73(a)(2)(vii), Common Cause Inoperability
10 CFR 50.73(a)(2)(i)
3872017001R00 - NRC Website
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text

'MAR 0 8 2017 Brad Berryman Site Vice President U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.2904 Fax 570.542.1504 Brad.Berryman@TalenEnergy.com TALEN~

ENERGY 10 CFR 50.73 SUSQUEHANNA STEAM ELECTRIC STATION LICENSEE EVENT REPORT 50-387(388)/2017-001-00 UNIT 1 LICENSE NO. NPF-14 UNIT 2 LICENSE NO. NPF -22 Docket No. 50-387 50-388 PLA-7576 Attached is Licensee Event Repmi (LER) 50-387(388)/2017-001-00. This LER repmis a condition that could have prevented fulfillment of the Secondary Containment integrity safety function. In this event, both doors for one of the secondary containment access airlocks were briefly opened simultaneously due to a human perfonnance enor. This LER is being submitted pursuant to the requirements of 10 CFR 50.73(a)(2)(v)(C).

There were no actual consequences to the health and safety of the public as a result of this event.

This letter contains no new regulatory commitments.

B. Benyman Attachment: LER 50-387(388)/2017-001-00 Copy:

NRC Region I Ms. T. E. Hood, NRC Project Manager Ms. L. H. Micewski, NRC Sr. Resident Inspector Mr. M. Shields, PA DEP/BRP

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 (06-2016)

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 />.

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f~.,;

LICENSEE EVENT REPORT (LER)

Reported lessons learned are incorporated into the licensing process and fed back to industry.

~~.... ~l Send comments regarding burden estimate to the FOIA, Privacy and Information Collections

~

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

Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail

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to lnfocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory (See NUREG-1 022, R.3 for instruction and guidance for completing this form Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an inlormation collection does not display a currently valid OMB control htiQ ://www. nrc.gov/reading-rm/doc-collections!nur~s/staff/sr1022/r3/)

number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

1. FACILITY NAME

~* DOCKET NUMBER

3. PAGE Susquehanna Steam Electric Station Unit 1 05000387 1 OF3
4. TITLE Secondary Containment Breach Due to Simultaneous Opening of Airlock Doors
5. EVENT DATE
6. LER NUMBER
7. REPORT DATE
8. OTHER FACILITIES INVOLVED YEAR I SEQUENTIAL I REV FACILITY NAME DOCKET NUMBER MONTH DAY YEAR NO.

MONTH DAY YEAR Susquehanna Steam Electric Station Unit 2 05000388 NUMBER 03 o5 FACILITY NAME DOCKET NUMBER 01 17 2017 2017 001 00 2017 05000

9. OPERA llNG MODE
11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: Check all that apply}

1 D 20.22o1(b)

D 20.2203(a)(3)(i)

D 50.73(a)(2)(ii)(A)

D 50.73(a)(2)(viii)(A)

D 20.2201(d)

D 20.2203(a)(3)(ii)

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

D 50.73(a)(2)(viii)(B)

D 20.2203(a)(1)

D 20.2203(a)(4)

D 50.73(a)(2)(iii)

D 50.73(a)(2)(ix)(A)

D 20.2203(a)(2)(i) 0 50.36(c)(1 )(i)(A)

D 50.73(a)(2)(iv)(A)

D 50.73(a)(2)(x)

10. POWER LEVEL D 20.2203(a)(2)(ii) 0 50.36(c)(1 )(ii)(A)

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

D 73.71(a)(4)

D 20.2203(a)(2)(iii)

D 50.36(c)(2)

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

D 73.71(a)(5) 100 D 20.2203(a)(2)(iv)

D 50.46(a)(3)(ii)

~ 50.73(a)(2)(v)(C)

D 73.77(a)(1)

D 20.2203(a)(2)(v) 0 50.73(a)(2)(i)(A)

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

D 73.77(a)(2)(i)

D 20.2203(a)(2)(vi)

D 50.73(a)(2)(i)(B)

D 50.73(a)(2)(vii)

D 73.77(a)(2)(ii) 0 50.73(a)(2)(i)(C) 0 OTHER Specify in Abstract below or in NRC Form 366A

12. LICENSEE CONTACT FOR THIS LER ICENSEE CONTACT

~ELEPHONE NUMBER (Include Area Code}

M. L. Krick, Senior EnQineer-Nuclear Requlatory Affairs (570) 542-1818 CAUSE SYSTEM COMPONENT MANU-REPORTABLE

CAUSE

SYSTEM COMPONENT MANU-REPORTABLE FACTURER TOEPIX FACTURER TO EPIX N/A N/A N/A N/A N/A

14. SUPPLEMENTAL REPORT EXPECTED
15. EXPECTED MONTH DAY YEAR 0 YES (If yes, complete 15. EXPECTED SUBMISSION DATE}

~NO SUBMISSION DATE ABSTRACT (Umit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines)

On January 17, 2017 at approximately 11:45, three employees with a group of visitors were exiting the Unit 1 Reactor Building Airlock on Elevation 676'. While processing through the card reader, an individual in the group opened the Turbine Building airlock door prior to the Reactor Building airlock door being completely closed. This resulted in not meeting Technical Specification 3.6.4.1 Surveillance Requirement 3.6.4.1.3, which requires that one secondary containment access door in each access opening is closed.

The cause of this event was determined to be less than adequate use of Human Performance Tools, including Self-Checking/ Stop, Think, Act and Review (STAR).

This condition requires reporting in accordance with 10 CFR 50.73(a)(2)(v)(C) as having both Secondary Containment airlock doors momentarily open simultaneously results in a condition that could have prevented fulfillment of a safety function.

There were no actual consequences to the health and safety of the public as a result of this event.

05000387

CONDITIONS PRIOR TO EVENT

Unit 1 - Mode 1, approximately 100 percent Rated Thermal Power Unit 2 - Mode 1, approximately 100 percent Rated Thermal Power YEAR I SEQUENTIAL I REV NUMBER NO.

2017

- 001
- 00 There were no systems, structures or components that were inoperable at the start of the event and contributed to the event.

EVENT DESCRIPTION

On January 17, 2017 at approximately 11:45, three employees with a group of visitors were exiting the Unit 1 Reactor Building [EllS Component Identifier: AL] Airlock [EllS Component Identifier: DR] on Elevation 676'. While processing through the card reader, an individual in the group opened the Turbine Building [EllS Component Identifier: NM] airlock door prior to the Reactor Building airlock door being completely closed. Upon hearing the alarm, security, who was present to help process visitors through the card reader, notified Security Control and the Shift Manager. All personnel then provided statements with respect to the event.

CAUSE OF EVENT

The cause of the event was determined to be less than adequate use of Human Performance Tools including Self-Check (STAR).

ANALYSIS/SAFETY SIGNIFICANCE

Technical Specification 3.6.4.1 Surveillance Requirement 3.6.4.1.3 requires that one secondary containment access door in each access opening is closed. This event is being reported pursuant to 10 CFR 50.73(a)(2)(v)(C) as having both Secondary Containment airlock doors momentarily open simultaneously results in a condition that could have prevented fulfillment of a safety function to mitigate the consequences of an accident by controlling the release of radioactive material.

There was no actual safety consequence as a result of this event. Engineering analysis of this event has determined that secondary containment could have performed its safety function of isolating, as assumed in the accident analysis, and also of re-establishing 0.25 in w.g. vacuum (drawdown) within the assumed accident analysis time (1 0 minutes). Therefore, the subject event did not cause a loss of safety function.

This event will not be counted as a safety system functional failure (SSFF) for the NRC performance indicator based on the Engineering analysis supporting the system's ability to fulfill the safety function.

CORRECTIVE ACTIONS

Key corrective actions include the following:

1. Coaching was provided to the individuals involved with respect to the use of airlock doors (Complete). Page 2 of 3 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 (06-2016)

LICENSEE EVENT REPORT (LER)

CONTINUATION SHEET (See NUREG-1 022, R.3 for instruction and guidance for completing this form http://WININ. nrc.gov/readi nq-rm/doc-collections/nureas/staff/sr1 022/r3/)

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 RegulatOJy Commission, Washington, DC 20555-0001, or by e-mail to lnfocollects.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.

3. LER NUMBER Susquehanna Steam Electric Station Unit 1

PREVIOUS SIMILAR EVENTS

05000387 YEAR 2017 The following recent LERs involved loss of Secondary Containment due to door issues:

I SEQUENTIAL I REV NUMBER NO.

- 001
- 00 LER 50-387(388)/ 2016-025-00 (PLA-7569), "Secondary Containment Breach due to Simultaneous Opening of Airlock Doors," dated January 26, 2017.

LER 50-387(388)/ 2016-023-00 (PLA-7547), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error," dated November 21, 2016.

LER 50-387(388)/ 2016-022-00 (PLA-7544), "Secondary Containment Breach due to Simultaneous Opening of Airlock Doors," dated December 1, 2016.

LER 50-387(388)/ 2016-021-00 (PLA-7515), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error," dated, August 17, 2016.

LER 50-387(388)/ 2016-017-00 (PLA-7564), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Human Performance Error During Security Response," dated December 21, 2016.

LER 50-387(388)/ 2016-015-00 (PLA-7493), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error," dated June 15, 2016.

LER 50-387(388)/ 2016-014-00 (PLA-7489), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error," dated June 9, 2016.

LER 50-387(388)/ 2016-013-00 (PLA-7492), "Secondary Containment Declared Inoperable Due to Simultaneous Opening of Double Airlock Doors," dated June 9, 2016.

LER 50-387(388)/ 2016-005-00 (PLA-7466), "Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error," dated May 16, 2016.

LER 50-387(388)/ 2016-004-00 (PLA-7467), "Momentary Loss of Secondary Containment due to Both Airlock Doors on Elevation 779 of the Unit 2 Reactor Building being Opened at the Same Time," dated May 10, 2016.

LER 50-387(388)/2016-002-00 (PLA-7454), "Secondary Containment Declared Inoperable due to an Airlock Doors Open Due to Random Occurrence," dated April 18, 2016.

LER 50-387(388)/ 2016-001-00 (PLA-7453), "Secondary Containment Declared Inoperable Due to an Airlock Door Open Due to Random Occurrence," dated April18, 2016. Page 3 of 3

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