ML20206F784

Forwards Questions Re 860324 Response to NRC 860220 Request for Addl Info Re Decommissioning Plan.Response Requested within 30 Days of Ltr Date

ML20206F784
Person / Time
Site:	05000433
Issue date:	06/13/1986
From:	Berkow H Office of Nuclear Reactor Regulation
To:	Profio A CALIFORNIA, UNIV. OF, SANTA BARBARA, CA
References
NUDOCS 8606240578
Download: ML20206F784 (4)

Text

m June 13, 1986 Docket No. 50-433 Dr. A. E. Proffo Nuclear Reactor Director Department of Chemical and Nuclear Engineering University of California, Santa Barbara Santa Barbara, California 93106

SUBJECT:

NRC REVIEW 0F UNIVERSITY OF CALIFORNIA, SANTA BARBARA, L-77 RESEARCH REACTOR DECOMMISSIONING PLAN We are continuing our review of the Decommissioning Plan that has been submitted in support of your application for authorization to decommission your L-77 research reactor. During our review of the additional information you had submitted in support of your Decommissioning Plan, several questions have arisen for which we require additional information and clarification.

These questions are based on your response dated March 24, 1986 to our request for additional information dated February 20, 1986. You are requested to document responses to the enclosed questions within 30 days of the date of this letter. Following receipt of the information we will complete our evaluation of your plans for decomissioning. If you have questions regarding this review, contact John Dosa, Project Manager, at (301) 492-8207.

Sincerely yours, original signed by 0.D.T. Lynch, Jr., for Herbert N. Berkow, Director Standardization and Special Projects Directorate Division of PWR Licensing-B

Enclosure:

As Stated cc: See next page

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%,, / June 13, 1986 Docket No. 50-433 Dr. A. E. Profio Nuclear Reactor Director Department of Chemical and Nuclear Engineering University of California, Santa Barbara Santa Barbara, California 93106

SUBJECT:

NRC REVIEW 0F UNIVERSITY OF CALIFORNIA, SANTA BARBARA, L-77 RESEARCH REACTOR DECOMMISSIONING PLAN We are continuing our review of the Decommissioning Plan that has been submitted in support of your application for authorization to decommission your L-77 research reactor. During our review of the additional infonnation you had submitted in support of your Decomissioning Plan, several questions have arisen for which we require additional information and clarification.

These questions are based on your response dated March 24, 1986 to our request for additional information dated February 20, 1986. You are requested to document responses to the enclosed questions within 30 days of the date of this letter. Following receipt of the information we will complete our evaluation of your plans for decommissioning. If you have questions regarding this review, contact John Dosa, Project Manager, at (301) 492-8207.

Sincerely yours,

~

/

Herbert N. erko , Director Standardization and Special Projects Directorate Division of PWR Licensing-B

Enclosure:

As Stated cc: See next page I

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Enclosure Follow Up Questions To UCSB Licensee's Response to Original Question #

12 and Region V #5 In your response to these questions you state that while the Nal(Tl) scintillation detector is energy sensitive, this fact is not significant when measuring radiation from activated concrete. Please describe basis for this statement. Explain how an energy sensitive NaI(TI) your scintillation detector will be cross calibrated against a Reuter-Stokes RS-111 HPIC which is not energy sensitive. How reliable is this technique if energies of activated products in the medium to be surveyed are unknown? Will you cross-calibrate the detectors separately for each different media surveyed using this technique?

Region V #1 Iri your response to this question you state that a sample of the shield water will be analyzed using a gas flow proportional counter. Is this a low background. gas flow proportional counter? Please identify the system you will be using.

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+ University of California at Docket No. 50-433 Santa Barbara cc: California Department of Health ATTN: Chief, Environmental Radiation Control Unit Radiologic Health Section 714 P Street, Room 498 Sacramento, California 95814 U. S. Environmental Protection Agency Region IX Office ATTN: EIS C0ORDINATOR 215 Freemont Street '

San Francisco, California 94111 Chief, Energy Systems Analyses Branch (AW-459)

Office of Radiation Programs U. S. Environmental Protection Agency Room 645, East Tower 401 M Street, S.W. .

Washington, D. C. 20460  !

Mayor City of Santa Barbara Santa Barbara, California 93101 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 - 9th Street Sacramento, California 95814 Attorney General 555 Capitol Mall Sacramento, California 95814 I

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