ML16299A387

Marssim Reclassification of Intake Structure

ML16299A387
Person / Time
Site:	Humboldt Bay
Issue date:	10/26/2016
From:	John Hickman Reactor Decommissioning Branch
To:	Sharp L Pacific Gas & Electric Co
HICKMAN J, 415-3017, T8-F05
References
Download: ML16299A387 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 26, 2016 Mr. Loren D. Sharp Senior Director Humboldt Bay Nuclear Humboldt Bay Power Plant 1000 King Salmon Avenue Eureka, CA 95503

SUBJECT:

HUMBOLDT BAY POWER PLANT UNIT 3 - MARSSIM RECLASSIFICATION OF INTAKE STRUCTURE

Dear Mr. Sharp:

In your letter dated September 28, 2016, you informed us of your intent to revise the MARSSIM classification of the intake structure from Class 1 to Class 3. Your reclassification was based on characterization surveys performed after the Humboldt Bay Power Plant Historical Site Assessment was developed. The letter further indicated that PG&E performed these surveys on the area of the intake structure where the most potential for contamination exists (i.e., the Unit 1 intake chambers with proximity to spill area) as the configuration of the intake structure was such that the entire structure was a confined space and could not be safely accessed.

We have reviewed your proposed reclassification and have no objections. We would like to note that this does not constitute approval of the survey unit for license termination. To support such a review in the future, the Final Status Survey Report should clearly describe the extent of and results of surveys performed, the as-left configuration of the structure after any demolition occurs, the reasoning for your survey approach, and a justification for the non-accessibility of the structure. In addition, since a portion of the structure is proposed to remain, the accessibility of the remaining structure should be assessed after any demolition to determine whether the same safety concerns exist at that point or not. If not, it may be prudent to survey additional accessible areas at that time.

Sincerely,

/RA/

John B. Hickman, Project Manager Reactor Decommissioning Branch Division of Decommissioning, Uranium Recovery and Waste Programs Office of Nuclear Material Safety and Safeguards Docket No. 50-133 cc: Humboldt Bay Service List

October 26, 2016 Mr. Loren D. Sharp Senior Director Humboldt Bay Nuclear Humboldt Bay Power Plant 1000 King Salmon Avenue Eureka, CA 95503

SUBJECT:

HUMBOLDT BAY POWER PLANT UNIT 3 - MARSSIM RECLASSIFICATION OF INTAKE STRUCTURE

Dear Mr. Sharp:

In your letter dated September 28, 2016, you informed us of your intent to revise the MARSSIM classification of the intake structure from Class 1 to Class 3. Your reclassification was based on characterization surveys performed after the Humboldt Bay Power Plant Historical Site Assessment was developed. The letter further indicated that PG&E performed these surveys on the area of the intake structure where the most potential for contamination exists (i.e., the Unit 1 intake chambers with proximity to spill area) as the configuration of the intake structure was such that the entire structure was a confined space and could not be safely accessed.

We have reviewed your proposed reclassification and have no objections. We would like to note that this does not constitute approval of the survey unit for license termination. To support such a review in the future, the Final Status Survey Report should clearly describe the extent of and results of surveys performed, the as-left configuration of the structure after any demolition occurs, the reasoning for your survey approach, and a justification for the non-accessibility of the structure. In addition, since a portion of the structure is proposed to remain, the accessibility of the remaining structure should be assessed after any demolition to determine whether the same safety concerns exist at that point or not. If not, it may be prudent to survey additional accessible areas at that time.

Sincerely,

/RA/

John B. Hickman, Project Manager Reactor Decommissioning Branch Division of Decommissioning, Uranium Recovery and Waste Programs Office of Nuclear Material Safety and Safeguards Docket No. 50-133 cc: Humboldt Bay Service List DISTRIBUTION: DCD r/f OGC ACRS/ACNW RKeller, RIV ML16299A387 OFFICE DUWP:PM DUWP:LA DUWP:HP DUWP:BC DUWP:PM NAME JHickman CHolston JClements BWatson JHickman DATE 10 / 25 /2016 10 / 26 /2016 10 / 26 /2016 10 /26/2016 10 /26/2016 OFFICIAL RECORD COPY

Humboldt Bay Power Plant, Unit 3 Service List cc:

Mr. Edward D. Halpin California Public Utilities Commission Senior Vice President and 505 Van Ness, Room 4102 Chief Nuclear Officer San Francisco, CA 94102 Pacific Gas and Electric Company P.O. Box 56 Redwood Alliance Mail Code 104/6 P.O. Box 293 Avila Beach, CA 93424 Arcata, CA 95521 Dr. Rich Ferguson, Energy Chair Loren Sharp Sierra Club California Director and Plant Manager 1100 11th Street, Suite 311 Humboldt Bay Nuclear Sacramento, CA 94814 Pacific Gas & Electric Company 1000 King Salmon Avenue Mr. Gonzalo Perez, Radiation Program Eureka, CA 95503 Director Radiologic Health Branch Jennifer K. Post Dept. of Health Services, MS-7610 Law Department P.O. Box 997414 Pacific Gas and Electric Company Sacramento, CA 95899-7414 77 Beale Street, B30A San Francisco, CA Stephen Hsu, M.S., Senior Health Physicist Radiological Assessment Unit Hossein Hamzehee Radioactive Material Licensing Section Regulatory Services Manager Radiologic Health Branch Diablo Canyon and Humboldt Bay Power Dept. of Health Services, MS-7610 Plant P.O. Box 997414 Pacific Gas and Electric Company Sacramento, CA 95899-7414 P.O. Box 56 Avila Beach, CA 93424 Commissioner California Energy Commission Chairman, Humboldt County Board 1516 Ninth Street of Supervisors Sacramento, CA 95814 County Courthouse 825 Fifth Street Deputy Attorney General Eureka, CA 95501 Office of the Attorney General for the State of California Regional Administrator, Region IV 600 W. Broadway, Suite 1800 U.S. Nuclear Regulatory Commission San Diego, CA 92101 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064