05000443/LER-2010-001, For Seabrook Station, Emergency Air Cleanup System Inoperable Due to Opening in Boundary
| ML101390208 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/14/2010 |
| From: | Freeman P Nextera Energy, NextEra Energy Seabrook |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| SBK-L-10086 LER 10-001-00 | |
| Download: ML101390208 (6) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(v), Loss of Safety Function 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 |
| 4432010001R00 - NRC Website | |
text
NExTera ENERGY 41 MAY 14, 2010 10 CFR 50.73 Docket No. 50-443 SBK-L-10086 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Seabrook Station Licensee Event Report (LER) 2010-001-00 Emergency Air Cleanup System Inoperable due to Opening in Boundary Enclosed is Licensee Event Report (LER) 2010-001-00. This LER reports an event that was discovered at Seabrook Station on March 17, 2010. This event is being reported pursuant to the requirements of 10 CFR 50.73(a)(2)(i)(B) and 50.73(a)(2)(v)(C).
Should you require further information regarding this matter, please contact Mr. Michael O'Keefe, Licensing Manager, at (603) 773-7745.
Sincerely, NextEra Energy Seabrook, LLC Paul Freeman Site Vice President cc:
S. J. Collins, NRC Region I Administrator G. E. Miller, NRC Project Manager W. J. Raymond, NRC Senior Resident Inspector NextEra Energy Seabrook, LLC, P.O. Box 300, Lafayette Road, Seabrook, NH 03874
SBK-L-10086 Seabrook Station Licensee Event Report (LER) 2010-001-00 Emergency Air Cleanup System Inoperable due to Opening in Boundary Ross, M.
e-mail Mashhadi, M.
e-mail Brown, A.
e-mail Dryden, M. S.
e-mail Fernandez, A.
e-mail Nicholson, L.
e-mail Letter Distribution e-mail File 0018 GLC RMD OAV
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 08/31/2010 9-2007)
, the NRC may digits/characters for each block) not conduct or sponsor, and a person is not required to respond to, the
- 3. PAGE Seabrook Station 05000443 1 OF 4
- 4. TITLE Emergency Air Cleanup System Inoperable due to Opening in Boundary
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MESEQUENTIAL I REV MONTH I YEA FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR NUMBER NO.
M Y
Y N/A 05000 I
I I I
FACILITY NAME DOCKET NUMBER 03 17 2010 2010
- - 001 00 05 14 2010 N/A 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)
El 20.2201(b)
[1 20.2203(a)(3)(i)
[l 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii) 1 El 20.2201(d)
El 20.2203(a)(3)(ii)
[] 50.73(a)(2)(ii)(A)
El 50.73(a)(2)(viii)(A)
El 20.2203(a)(1)
El 20.2203(a)(4)
El 50.73(a)(2)(ii)(B)
El 50.73(a)(2)(viii)(B)
[E 20.2203(a)(2)(i)
El 50.36(c)(1)(i)(A)
[] 50.73(a)(2)(iii)
El 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2)(ii)
[E 50.36(c)(1)(ii)(A)
[I 50.73(a)(2)(iv)(A)
El 50.73(a)(2)(x)
[I 20.2203(a)(2)(iii)
El 50.36(c)(2)
El 50.73(a)(2)(v)(A)
[E 73.71(a)(4)
El 20.2203(a)(2)(iv)
El 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B)
El 73.71(a)(5) 100 El 20.2203(a)(2)(v)
El 50.73(a)(2)(i)(A)
ED 50.73(a)(2)(v)(C)
El OTHER El 20.2203(a)(2)(vi)
[I 50.73(a)(2)(i)(B)
El 50.73(a)(2)(v)(D)
Specify in Abstract below
__r in MNI.
- F*,n,
'AAA
- 12. LICENSEE CONTACT FOR THIS LER FACILITY NAME TELEPHONE NUMBER (include Area Code)
Michael O'Keefe, Licensing Manager (603) 773-7745SYSTEMMANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE
CAUSE
COMPONENT FACTURER TO EPIX I
FACTURER TO EPIX
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH DAY YEAR SUBMISSION YES (Ifyes, complete 15. EXPECTED SUBMISSION DATE)
X NO DATE ABSTRACT (Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines)
On March 15, 2010 during operation in mode 1 at 100% power, both trains of the containment enclosure emergency air cleanup system (CEEACS) were rendered inoperable due to an opening in the ventilation area boundary. For approximately five hours on March 15 and approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> on March 17, a door in the containment enclosure boundary (CEB) was opened to support planned maintenance activities in the positive displacement charging pump room. Under accident conditions, the CEEACS maintains a negative pressure in the enclosure surrounding the containment to prevent uncontrolled releases of radioactivity into the environment.
However, the breach in the CEB created by the open door would have prevented both trains of the CEEACS from establishing the minimum required negative pressure in the enclosure. This condition placed the plant in Technical Specification (TS) 3.0.3, although it was unrecognized at the time, and resulted in a loss of safety function for the CEEACS. The causes of the event included lack of programmatic controls to ensure the control room is notified prior to propping open a CEB door and historical guidance that led the operators to believe that only TS 3.6.5.2, Containment Enclosure Boundary Integrity, applied when a CEB door was open. The planned corrective actions will strengthen an existing program to address opening CEB doors and revise the TS.
NRC FORM 366 (9-2007
(If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17)
V. Additional Information
The Energy Industry Identification System (EIIS) codes are included in this LER in the following format: [EIIS system identifier, EIIS component identifier].
VI. Similar Events
LER 2005-004 reported an event in March 2005 that resulted in a condition prohibited by the TS. In this event, the historical implementation of the TS had been incorrect and resulted in noncompliance with the TS regarding off-site power sources.
The corrective actions for this event included revising the TS bases to provide.
guidance on appropriate implementation of the TS.