ML20113E131

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Informs That Disassembly of Reactor Core Necessary to Conduct Radiation Survey of Residual Radiation,In Anticipation of Reactor Decommissioning.Authorization to Conduct Intended Survey Assumed Unnecessary
ML20113E131
Person / Time
Site: 05000142
Issue date: 01/16/1985
From: Wegst W
CALIFORNIA, UNIV. OF, LOS ANGELES, CA
To: Harold Denton
Office of Nuclear Reactor Regulation
References
NUDOCS 8501230322
Download: ML20113E131 (1)


Text

UNIVERSITY OF CALIFORNIA, LOS ANGELES UCLA j

sonunnu suru nez tos ucates. nnrasmr so meco su ranasco ninuter. oms. mmt COMMUNITY SAFETY DEPARTMENT OFFICE OF RESEARCH 4 OCCUPATIONAL SAFETY IDS ANGELES, CALIFORNIA 90094 i

16 January 1985 Mr. Harold Denton, Director Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D. C.

20555 ATTN:

SSPB Docket No. 50-142 License No. R-71

Dear Mr. Denton:

The subject license has been amended to a " possession only" license in anticipation of decommissioning the reactor. UCLA has not yet elected a decommissioning mode, and is not likely to do so without better knowledge of the sources and extent of the residual radioactive material in the reactor core and biological shield.

In order to conduct a suitable radiation survey of residual radiation, it will be necessary to disassemble the reactor core.

I note that UCLA has so disassembled and reassembled the reactor on several previous occasions for the purpose of maintainence. The assembly of an Argonaut core involves the careful stacking of many pieces of graphite and is far more demanding than disassembly in terms of worker hours and radiation exposure.

The UCLA plan does not include reassembly; the disassembly is well within the realm of UCLA experience, and unless your office advises us to the contrary, we will assume that we may proceed without authorization to conduct the intended radiation survey, Sincerely, WC $ h Walter F. Wegst, Director, Research & Occupational Safety cc:

B. Cormier 0t9 8501230322 850116 PDR ADOCK 05000142 P

PDR i

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