ML16202A148: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
 
Line 1: Line 1:
{{Adams
#REDIRECT [[05000220/LER-2016-001]]
| number = ML16202A148
| issue date = 07/12/2016
| title = LER 16-001-00 for Nine Mile Point Nuclear Station Unit 1 Regarding Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors
| author name = Kreider R E
| author affiliation = Exelon Generation Co, LLC
| addressee name =
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000220
| license number = DPR-063
| contact person =
| case reference number = NMP1L 3093
| document report number = LER 16-001-00
| document type = Letter, Licensee Event Report (LER)
| page count = 7
}}
 
=Text=
{{#Wiki_filter:,Alfi '/ Exelon Generation NMP1L3093 July 12, 2016 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Nine Mile Point Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-63 Docket No. 50-220 10 CFR 50.73
 
==Subject:==
NMP1 Licensee Event Report 2016-001, Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors In accordance with the reporting requirements contained in 1 O CFR 50.73(a)(2)(v)(C), please find enclosed NMP1 Licensee Event Report (LER) 2016-001, Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors. There are no regulatory commitments contained in this letter. Should you have any questions regarding the information in this submittal, please contact Dennis Moore, Site Regulatory Assurance Manager, at (315) 349-5219.
Respectfully, Robert E. Kreider Jr. Plant Manager, Nine Mile Point Nuclear Station Exelon Generation Company, LLC REK/KJK
 
==Enclosure:==
 
NMP1 Licensee Event Report 2016-001, Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors cc: NRC Regional Administrator, Region I NRC Resident Inspector NRC Project Manager Enclosure NMP1 Licensee Event Report 2016-001, Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors Nine Mile Point Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-63 NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 (11-2015)
Estimated burden per response to comply with this mandatory collection request: 80 hours. 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 EVENT REPORT (LER) Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by **-internet 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, digits/characters for each block) DC 20503. If a means used to impose an information collection does not display a currently valid OMB control number, the NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
: 1. FACILITY NAME 2. DOCKET NUMBER 3. PAGE Nine Mile Point Unit 1 05000220 1 OF 5 4. TITLE Secondary Containment Inoperable Due to Simultaneous Opening of Airlock Doors 5. EVENT DATE 6. LER NUMBER 7. REPORT DATE 8. OTHER FACILITIES INVOLVED I SEQUENTIAL I REV FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR NUMBER NO. MONTH DAY YEAR N/A N/A FACILITY NAME DOCKET NUMBER 06 01 2016 2016 -001 -00 07 12 2016 N/A N/A 9. OPERATING MODE 11. THIS REPORT IS SUBMITIED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: {Check all that apply) D 20.2201 (b) D 20.22oa(a)(a)(il D 50.73(a)(2)(ii)(A)
D 50.73(a)(2)(viii)(A) 1 D 20.2201 (dl D 20.22oa(a)(a)(iil D 50.73(a)(2)(ii)(B)
D 50.73(a)(2)(viii)(B)
D 20.22oa(a)(1 i D 20.22oa(a)(4)
D so.1a(a)(2)(iiil D 50.73(a)(2)(ix)(A)
D 20.22oa(a)(2)(il D 50.36(c)(1
)(i)(A) D 50.73(a)(2)(iv)(A)
D 50.73(a)(2)(x) 1 O. POWER LEVEL D 20.22oa(a)(2)(iil D 50.36(c)(1)(ii)(A)
D 50.73(a)(2)(v)(A)
D 1a.11(a)(4l D 20.22oa(a)(2)(iiil D so.as(c)(2)
D 50.73(a)(2)(v)(B)
D 1a.11 (a)(s) D 20.2203(a)(2)(iv)
D so.4s(a)(3l(iil
[8] 50.73(a)(2)(v)(C)
D 1a.11(a)(1>
100% D 20.2203(a)(2)(v)
D 50.73(a)(2)(i)(A)
D 50.73(a)(2)(v)(D)
D 1a.11(a)(2)(i)
D 20.2203(a)(2)(vi)
D 50.73(a)(2)(i)(B)
D 50.73(a)(2)(vii)
D 1a.11(a)(2)(n>
"'** ,,_.,.,_ $ ... ... . . D 50.73(a)(2)(i)(C)
D OTHER Ii* "" * ** *'*, r* .* ,..
* l Specify in Abstract below or in NRC Form 366A 12. LICENSEE CONTACT FOR THIS LEA LICENSEE CONTACT I TELEPHONE NUMBER (Include Area Code) Dennis Moore, Site Regulatory Assurance Manager (315) 349-5219 13. COMPLETE ONE LINE FOR EACH COMPONENT FAILURE DESCRIBED IN THIS REPORT CAUSE SYSTEM COMPONENT MANU-REPORTABLE CAUSE SYSTEM COMPONENT MANU-REPORTABLE FACTURER TO EPIX FACTURER TO EPIX N/A N/A N/A N/A N/A 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 DA TE) [8J NO SUBMISSION DATE N/A N/A N/A ABSTRACT (Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines) On Wednesday June 1, 2016, at approximately 1046, the secondary containment of the Nine Mile Point Unit 1 (NMP1) Reactor Building was momentarjly breached when workers opened both airlock doors on elevation 261 simultaneously.
The integrity of the airlock was re-established within 5 seconds when one of the doors was closed and latched. The cause of this event is personal accountability.
With clear understanding of the expectations for using the airlock doors in conjunction with all mechanical barriers (lights, buzzers, monitors) functioning properly, the individual failed to use human performance tools to verify the airlock was not already being used by other individuals.
This condition is reportable under 1 O CFR 50.72(b)(3)(v)(C) and 10 CFR 50.73(a)(2)(v)(C).
NRC FORM 366 (11-2015)
Page 2 of 5 NRC FORM 366A (11-2015)
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 Estimated burden per response to comply with this mandatory collection request: 80 hours. 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 lnfocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatmy 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 NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
LICENSEE EVENT REPORT (LER) CONTINUATION SHEET 1. FACILITY NAME 2. DOCKET NUMBER 3. LEA NUMBER YEAR Nine Mile Point Unit 1 05000-220 SEQUENTIAL NUMBER REV NO. 2016 -001 NARRATIVE I. DESCRIPTION OF EVENT A. PRE-EVENT PLANT CONDITIONS:
Prior to the event, Nine Mile Point Unit 1 (NMP1) was operating at 100% reactor power. B. EVENT: On Wednesday June 1, 2016, at approximately 1046, the secondary containment of the Unit 1 Reactor Building was breached when workers opened both airlock doors on elevation 261 simultaneously.
The integrity of the airlock was re-established within 5 seconds when one of the doors was closed and latched. During the event, two groups of individuals were attempting to use the Unit 1 airlock doors D-52 and D-53 simultaneously while exiting the Reactor Building.
The cause of this event is personal accountability.
With clear understanding of the expectations for using the airlock doors in conjunction with all mechanical barriers (lights, buzzers, monitors) functioning properly, the individual failed to use human performance tools to verify the airlock was not already being used by other individuals.
Operations review determined that the simultaneous opening of both secondary containment airlock doors constituted a momentary loss of secondary containment per Technical Specification 3.4.3 and NU REG 1022, Revision 3 .. This event represents a potential loss of secondary containment safety function as presented in Technical Specification 3.4.3, Access Control. This condition is reportable under 1 O CFR 50.72(b)(3)(v)(C) and 1 O CFR 50.73(a)(2)(v)(C) as any_ event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to control the release of radioactive material.
Nine Mile Point Unit 2 (NMP2) was unaffected by both airlock doors being open at NMP1. The event has. been entered into the plant's corrective action program as IR 2676493. C. INOPERABLE STRUCTURES, COMPONENTS, OR SYSTEMS THAT CONTRIBUTED TO THE EVENT: No other systems, structures, or components contributed to this event. NRG FORM 366A (11-2015) 00 Page 3 of 5 NRC FORM 366A (11-2015)
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 Estimated burden per response to comply with this mandatory collection request: 80 hours. 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 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 NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
LICENSEE EVENT REPORT (LER) CONTINUATION SHEET 1. FACILITY NAME 2. DOCKET NUMBER 3. LEA NUMBER YEAR Nine Mile Point Unit 1 05000-220 SEQUENTIAL NUMBER REV NO. 2016 -001 -00 NARRATIVE D. DATES AND APPROXIMATE TIMES OF MAJOR OCCURRENCES AND OPERATOR ACTIONS: The dates, times, and major occurrences and operator actions for this event are as follows. All dates are 2016. June 1 1046 Individual 1 had entered the airlock via door D-53 (inner door) and was in the process of exiting the airlock via door D-52 (outer door). 1046 Without verifying on the monitors that other personnel were either in the airlock or attempting to enter the airlock through the opposing door D-52, Individual 2 opened door D-53 while Individual 1 was opening door D-52. 1046 Upon the realization that both doors had been breached simultaneously, the doors were immediately (less than 5 seconds) closed re-establishing containment integrity.
During the time both doors are open, NMP1 Limiting Condition of Operation 3.4.3 is not met.
* E. METHOD OF DISCOVERY:
This event was self-identified by station personnel traversing the Reactor Building airlock doors. F. SAFETY SYSTEM RESPONSES:
The duration of the event was 5 seconds, or less. Review of the Reactor Building differential pressure as recorded by the plant process computer for the time period of the event indicated that the actual differential pressure remained negative and was unaffected by the brief simultaneous opening of the airlock doors. Operators entered the applicable TS action statement then exited it soon afterwards.
The event concluded when the airlock door was shut. II. CAUSE OF EVENT: The cause of this event is personal accountability.
With clear understanding of the expectations for using the airlock doors in conjunction with all mechanical barriers (lights, buzzers, monitors) functioning properly, the individual failed to use human performance tools to verify the airlock was not already being used by other individuals.
NRC FORM 366A (11-2015)
Page 4 of 5 NRC FORM 366A (11-2015)
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/201 B LICENSEE EVENT REPORT (LER) CONTINUATION SHEET Estimated burden per response to comply with this mandatory collection request: BO hours. 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 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 valid OMB control number, the NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
: 1. FACILITY NAME 2. DOCKET NUMBER Nine Mile Point Unit 1 05000-220 NARRATIVE III. ANALYSIS OF THE EVENT: YEAR 2016 -3. LER NUMBER SEQUENTIAL NUMBER 001 Simultaneous opening of both reactor building airlock doors is reportable under 1 O CFR 50.72(b)(3)(v)(C) and 1 O CFR as any event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to control the release of radioactive material.
Secondary containment structural integrity, the ability to automatically isolate the non-safety related Reactor Building ventilation system, and the Reactor Building Emergency Ventilation System availability were not impacted by the event. It is concluded that the safety significance of this event is low and the event did not pose a threat to the health and safety of the public or plant personnel.
The analysis of the event determined the safety function was not prevented from being fulfilled, the occurrence is not considered a safety system functional failure. This event does not affect the NRC Regulatory Oversight Process Indicators.
IV. CORRECTIVE ACTIONS: A. ACTION TAKEN TO RETURN AFFECTED SYSTEMS TO PRE-EVENT NORMAL. STATUS: Airlock doors were closed and secondary containment was restored to Operable status. B. ACTION TAKEN OR PLANNED TO PREVENT RECURRENCE:
In accordance with station policies and procedures, Performance Management was applied to the individual who failed to use their human performance**tools resulting in both airlock doors being opened simultaneously.
V. ADDITIONAL INFORMATION:
A. FAILED COMPONENTS:
There were no failed components that contributed to this event. B. PREVIOUS LERs ON SIMILAR EVENTS: NMP1 LER 2014-004, August 13, 2014. NMP1 LER 2014-005, October 16, 2014. NMP1 LER 2014-006, October 20, 2014. NMP1 LER 2015-001, February 11, 2015. NMP1 LER 2015-002, March 3, 2015. NRG FORM 366A (11-2015)
REV NO. 00 Page 5 of 5 NRC FORM 366A (11-2015)
U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018
.?#"' LICENSEE EVENT REPORT (LER) .... J CONTINUATION SHEET Estimated burden per response to comply with this mandatory collection request: 80 hours. 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 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 OMS control number, the NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
: 1. FACILITY NAME 2. DOCKET NUMBER 3. LEA NUMBER YEAR Nine Mile Point Unit 1 05000-220 SEQUENTIAL NUMBER REV NO. NARRATIVE 2016 -001 NMP1 LER 2015-003, August 5, 2015. For the LERs listed above, the secondary containment of the Nine Mile Point Unit 1 (NMP1) Reactor Building was breached when workers opened both inner and outer airlock doors simultaneously while passing through. The integrity of the airlock was established within 5 seconds, or less, when one of the doors was closed and latched. Secondary Containment differential pressure was unaffected by these events. C. THE ENERGY INDUSTRY IDENTIFICATION SYSTEM (EIIS) COMPONENT FUNCTION IDENTIFIER AND SYSTEM NAME OF EACH COMPONENT OR SYSTEM REFERRED TO INTHISLER:
COMPONENT Reactor Building (BWR) Reactor Building Ventilation System Airlock Door D. SPECIAL COMMENTS:
None NRG FORM 366A (11-2015)
IEEE 803 FUNCTION IDENTIFIER N/A PDIC DR IEEE 805 SYSTEM IDENTIFICATION NG VA NG 00}}

Latest revision as of 16:25, 12 July 2018

Redirect to:

Retrieved from "https://kanterella.com/w/index.php?title=ML16202A148&oldid=880461"