05000280/LER-2019-002, Items Non-Conforming to Design for Tornado Missile Protection
| ML20054A141 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 02/04/2020 |
| From: | Mladen F Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 20-041 LER 2019-002-00 | |
| Download: ML20054A141 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(iii) 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)(v), Loss of Safety Function 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) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition |
| 2802019002R00 - NRC Website | |
text
10CFR50.73 Virginia Electric and Power Company Surry Power Station February 4, 2020 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555-0001 5570 Hog Island Road Surry, Virginia 23883 Serial No.:
SPS:
Docket No.:
20-041 SCN 50-280 50-281 License No.: DPR-32 DPR~37
Dear Sir ot Madam:
Pursuant to 10CFR50.7'3, Virginia Electric and Power Company hereby submits the following Licensee Event Report applicable to Surry Power Station Units 1 and 2.
Report No. 50-280, 50-281 / 2019-002-00 This report has been reviewed by the Station Facility Safety Review Committee and will be forwarded to the Management Safety Review Committee.
Enclosure Commitment contained in this letter: None Very truly yours, F. Mladen Site Vice President Surry Power Station cc:
U.S. Nuclear Regulatory Commission, Region II Marquis One Tower, Suite 1200 2~5 Peachtree Center Ave., NE Atlanta, GA 30303-1257 NRG Senior Resident Inspector Surry Power Station TEZZ
-~'
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY 0MB: NO. 3150-0104 EXPIRES: 03/31/2020 (04-2018)
, the NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 3. Page Surry Power Station Unit 1 05000 280 1
OF 3
- 4. Title Items Non-Conforming to Design for Tornado Missile Protection
- 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 Surry Power Station Unit 2 05000 281 Facility Name Docket Number 12 11 2019 2019 -
002
~
00 02 04 2020 05000
- 9. Operating Mode
- 11. This Report is Submitted Pursuant to the Requirements of 1 O CFR §: (Check all that apply)
D 20.2201(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)
[2] 50. 73(a)(2)(ii)(B)
D 50. 73(a)(2)(viii)(B)
N D 20.2203(a)(1)
D 20.2203(a)(4)
D 50.73(a)(2)(iii)
D 50. 73(a)(2)(ix)(A)
D D
D D
20.2203(a)(2)(i) 50.36(c)(1 )(i)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x)
- 10. Power Level D 20.2203(a)(2)(ii)
D 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)
- o 73. 71 (a)(5)
D 20.2203(a)(2)(iv)
D 50.46(a)(3)(ii)
D 50.73(a)(2)(v)(C)
D 73. 77(a)(1) 100 D 20.2203(a)(2)(v)
D 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)
[2] 50.73(a)(2)(i)(B)
D 50.73(a)(2)(vii)
D 73.77(a)(2)(ii)
D 50.73(a)(2)(i)(C)
D Other (Specify in Abstract below or in The affected equipment was declared inoperable and enforcement discretion invoked in accordance with NRC Enforcement Guidance Memorandum (EGM) 15-002, Rev. 1, "Enforcement Discretion for Tornado Missile Protection Noncompliance." Initial compensatory measures were implemented pursuant to tlie guidance of NRC Interim Staff Guidance DSS-ISG-2016-01, Appendix A, within the time allowed by the applicable Limiting Conditions for Operation (LCOs) and the associated systems were then declared operable, but nonconforming. An 8-hour ENS notification was submitted [Event Notification 54437].
This event is reportable in accordance with 10 CFR 50. 73(a)(2)(i)(B) as a condition prohibited by Technical Specification and 10 CFR 50.73(a)(2)(ii)(B) as an event or condition that resulted in the nuclear power plant being in an unanalyzed condition that significantly degraded plant safety. These reporting criteria were selected based on the historical nature of the issue.
C: Cause of Event:
This condition was part of the original plant design and licensing of the station. There was no specific cause identified.
D: Safety Consequences:
As documented EGM 15-002 (Rev. 1 ), tornado missile scenarios that may lead to core damage are very low probability events because safety-related SSCs are typically designed to withstand the effects of tornados. In addition, because plants are designed with redundancy and diversity, the tornado missiles would have to affect multiple trains of safety systems and/or means of achieving safe shutdown.
E: Corrective Action:
For the Surry Power Station, enforcement discretion provided by EGM 15-002 remains in effect until June 10, 2020, at which time modifications, analysis, license amendments, or other actions must be implemented to resolve the missile vulnerabilities.
F: Previous Occurrences:
There have been no previous Licensee Event Reports at Surry Power Station on this issue.
G: Component Failures:
None. Page 3
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