05000397/LER-2021-001, Breach of Secondary Containment
| ML21266A279 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 09/23/2021 |
| From: | David Brown Energy Northwest |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| References | |
| GO2-21-113 LER 2021-001-00 | |
| Download: ML21266A279 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(v), Loss of Safety Function |
| 3972021001R00 - NRC Website | |
text
10 CFR 50.73 GO2-21-113 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001
Subject:
COLUMBIA GENERATING STATION, DOCKET NO. 50-397 LICENSEE EVENT REPORT NO. 2021-001-00
Dear Sir or Madam:
Transmitted herewith is Licensee Event Report No. 2021-001-00 for Columbia Generating Station. This report is submitted pursuant to 50.73(a)(2)(v)(C) and 50.73(a)(2)(v)(D).
There are no commitments being made to the Nuclear Regulatory Commission by this letter. If you have any questions or require additional information, please contact Ms. D.M. Wolfgramm, Regulatory Affairs Manager, at (509) 377-4792.
Executed on this ______ day of ____________, 2021.
Respectfully, David P. Brown Site Vice President Attachment: Licensee Event Report 2021-001-00 cc:
NRC Region IV Regional Admin NRC Region IV Project Manager NRC Senior Resident Inspector/988C C.D. Sonoda - BPA/1399 David P. Brown Columbia Generating Station P.O. Box 968, MD PE23 Richland, WA 99352-0968 Ph. 509-377-8385 dpbrown@energy-northwest.com
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September 23, 2021 ENERGY NORTHWEST
NRC FORM 366 (08-2020)
U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT (LER)
(See Page 3 for required number of digits/characters for each block)
(See NUREG-1022, R.3 for instruction and guidance for completing this form http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3/)
APPROVED BY OMB: NO. 3150-0104 EXPIRES: 08/31/2023
- 1. Facility Name 05000
- 2. Docket Number
- 3. Page 1 OF
- 4. Title
- 5. Event Date Month Day Year
- 6. LER Number Year Sequential Number Revision No.
- 7. Report Date Month Day Year
- 8. Other Facilities Involved Facility Name 05000 Facility Name Docket Number 05000 Docket Number
- 9. Operating Mode
- 10. Power Level
Month Day Year Columbia Generating Station 397 3
Breach of Secondary Containment 07 28 2021 2021 001 Mode 1 100%
Valerie Lagen, Principal Licensing Engineer (509) 372-5507
16. Abstract (Limit to 1560 spaces, i.e., approximately 15 single-spaced typewritten lines)
On July 28th, 2021, Columbia Generating Station was in Mode 1 at 100% reactor power when a Secondary Containment
5HDFWRU%XLOGLQJ roof hatch was opened to support maintenance activities. The breach in Secondary Containment resulted in Surveillance Requirement 3.6.4.1.2 QRWEHLQJ met. 0aintenance personnel did not notify Operations prior to opening the roof hatch and Technical Specification Action Statement 76$6 3.6.4.1.A was not entered as required. The breach also resulted in Secondary Containment exceeding the 7HFKQLFDO6SHFLILFDWLRQ 76 limit of vacuum of less than 0.25 inches of vacuum water gauge.
While T6 limits were EULHIO\\exceeded the resulting pressure excursion was bounded by analytical results; and thus, there were no safety consequences for this condition. This event was reported under reporting criteria 10 CFR 50.72(E)()(v)(C) and 50.72(E)()(v)(D) as Event Notification#55385.
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