ML101170670
| ML101170670 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 05/20/2010 |
| From: | John Hickman NRC/FSME/DWMEP/DURLD/RDB |
| To: | Division of Operating Reactor Licensing |
| John Hickman (301) 415-3017 | |
| References | |
| Download: ML101170670 (4) | |
Text
May 20, 2010 MEMORANDUM TO: Biweekly Notice Coordinator FROM:
John B. Hickman, Project Manager /RA/
Reactor Decommissioning Branch Decommissioning and Uranium Recovery Licensing Directorate Division of Waste Management and Environmental Protection Office of Federal and State Materials and Environmental Management Programs
SUBJECT:
REQUEST FOR PUBLICATION IN BIWEEKLY FR NOTICE - NOTICE OF CONSIDERATION OF ISSUANCE OF AMENDMENT TO FACILITY OPERATING LICENSE, PROPOSED NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION, AND OPPORTUNITY FOR A HEARING Pacific Gas and Electric Co., Docket No. 50-133, Humboldt Bay Power Plant (HBPP), Unit 3 Humboldt County, California Date of amendment request: April 9, 2010 Description of amendment request: The licensee has proposed amending the technical specifications (TS) to delete TS 3.1.3, "Fuel Storage Pool Liner Water Level." TS 3.1.3 places restrictions on the maximum operating water level in the gap between the stainless steel liner covering the inside surface of the fuel storage pool and the pool walls. This TS restriction was originally intended to preclude leakage from the fuel storage pool to surrounding groundwater, and to preclude groundwater seepage into the pool. Additional conforming and editorial changes are also proposed.
Basis for proposed no significant hazards consideration determination: As required by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards consideration, which is presented below:
2 (1)
Does the change involve a significant increase in the probability or consequences of an accident previously evaluated?
Response: No.
The proposed changes eliminate the TS requirement to control the operating water level in the gap between the fuel storage pool liner and the pool concrete structure and delete the TS sections that are applicable to Limiting Conditions for Operation (LCO).
Elimination of the TS requirements to control liner gap water level will not increase the probability or consequences of the previously analyzed (and recently updated) fuel storage pool rupture accident. The basis of TS 3.1.3 is to preclude both pool leakage to the surrounding groundwater and groundwater leakage into the pool. The radiological consequences of pool leakage are conservatively bounded by the fuel storage pool rupture analysis, an analysis which demonstrates that the consequences of a breech of the fuel storage pool are insignificant.
Additionally, the proposed changes will not result in the modification of any systems, structures or components and will not affect any parameters or conditions that could contribute to the initiation of an accident.
Therefore, the proposed changes will not involve a significant increase in the probability or consequences of an accident previously evaluated.
(2)
Does the change create the possibility of a new or different kind of accident from any accident evaluated?
Response: No.
The proposed changes will not result in the modification of any systems, structures or components and will not affect any parameters or conditions that could contribute to the initiation of an accident. Therefore, the proposed changes will not create the possibility of a new or different kind of accident from those previously evaluated (3)
Does the change involve a significant reduction in a margin of safety?
Response: No.
The design basis and accident assumptions within the Humboldt Bay Power Plant (HBPP) Unit 3 Defueled Safety Analysis Report and the TS relating to spent fuel are no longer applicable. The proposed changes do not affect remaining plant operations, nor structures, systems, or components supporting decommissioning activities. In addition, the proposed changes do not result in a change in initial conditions, system response time, or in any other parameter affecting the course of a decommissioning activity accident analysis. Therefore, the proposed changes will not involve a significant reduction in the margin of safety.
3 The NRC staff has reviewed the licensee's analysis and, based on this review, it appears that the three standards of 10 CFR 50.92(c) are satisfied. Therefore, the NRC staff proposes to determine that the amendment request involves no significant hazards consideration.
Attorney for licensee: Ms. Jennifer K. Post, Pacific Gas and Electric Company, 77 Beale Street, B30A, San Francisco, CA NRC Branch Chief: Bruce Watson (Acting)
3 The NRC staff has reviewed the licensee's analysis and, based on this review, it appears that the three standards of 10 CFR 50.92(c) are satisfied. Therefore, the NRC staff proposes to determine that the amendment request involves no significant hazards consideration.
Attorney for licensee: Ms. Jennifer K. Post, Pacific Gas and Electric Company, 77 Beale Street, B30A, San Francisco, CA NRC Branch Chief: Bruce Watson (Acting)
DISTRIBUTION:
DCD R/F OGC JHickman APersinko KMcConnell DBSpitzberg, RIV ML101170670 OFFICE RDB/PM DWMEP/LA OGC RDB/BC NAME JHickman CHolston AP NLO BWatson (A)
DATE 04/ 28/2010 04/27/2010 05/12/2010 05/20/2010 OFFICIAL RECORD COPY