ML20052A992

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Application to Amend License SNM-1154,extending Environ Tests of U-Zirconium Fuel Element Sections to Include Segments of Irradiated Reactor Fuel Elements.Related Info Encl
ML20052A992
Person / Time
Site: 07001216
Issue date: 08/30/1971
From: Vehar M
NAVY, DEPT. OF
To:
US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20049A233 List: ... further results
References
FOIA-81-428 1104-26, 4077, NUDOCS 8204290525
Download: ML20052A992 (7)
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{{#Wiki_filter:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ? 1. O AKIT Nowa( ,.f[j "S,2.' DEPARTMENT OF THE NAVY a [f/f 9 5. NAVAL UADERSEA RESEARCH AND DEVELOPMENT CENTER th

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SAN DIEGO. C ALIFORNIA 92132 m REpty naran vo: 'k 10330' Ser: 1104-26 AUG 1371 Fror: Commander, Naval Undersea Fesearch and Development Center To: Chief, Division of Materials Licensing, U. S. Atomic Energy Cornission, Unshing, ton, D. C. 20545 Vl a: Commander, Naval Facilities Engineering Command, Code 042 Subj: Special Nuclear Material License SNM-1154; request for amendment of Encl: (1) Test Program Environmental Tests of Uranium-Zirconium Fuel Element Sections 1. 'Ihe Naval Undersea Research and Development Center has conducted rarine environmental tests of several SNAP systems and fuel forms for the Division of Reactor Development and Technology and for the Space Electric Pouer Office (SEPO), AEC. The Center has been requested by SEPO to extend this program to include segments of irradiated reactor fuel elements. 2. Enclosure (1) is subm tted as information concerning the test program, the naterials to be used and the safety procedures to be followed in the program. An arendment to SNM-ll54 is requested, to authorize the possession and use of the special nuclear caterial contained in the fuel elements along with the associated fission products resulting from reactor irradiation. A V M. E. VEHAR m q N DY d\\racGon {Q ~ s [c. " sip D.? g $f -h; Zl d M 50.gi.. A ~:~ ~IY cy} D Gk ' N s.) tih,,.,,..... - ? 't TM ,. 73 . g,. a - a cB nu 3.a u3 8204290525 ast.cc l

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'. 'a 7 c_ 1 TEST PROGRAM Environmental Tests of Uranium-Zirconium Hydride Fuel Element Sections 1. General Information Under the sponsorship of the Space Electric Power Office, a. AEC, the Naval Undersea Research and Devalopment Center is planning a test program to determine the effects or the ocean environment on the physical and chemical characteristics of Uranium-zirconium hydride fuel elements used as fuel for SNAP devices. These elements are in the form of discs 1/2 inch in diameter and 1/4 inch thick, that have been cut from Atomics International-irradiated fuel elements. The discs will be supplied by the Los Alamos Scientific Laboratory. b. Two discs will be used in the program. They were cut from AI fuel elements that had received 10,000 hours of reactor irradiation ending in 1965. Estimates of fission product content given below were made on the basis of existing radiation levels. The sample designations and description are: (1) Sample No. E-171-2. Unclad fuel segment, containing 0.555 grams U-235 and approximately one curie of fission products. Radiation level is 900 mr/hr at a distance of one foot. Fission products present include Cs-137, Sr-90, Cc-144 and Pm-147. (2) Sample No. E-528-2. Hastelloy-N cladding on circumference of disc. Same U-235 and fission product content as sample No. E-171-2 Radiation level is 800 mr/hr at a distance of one foot. CO-6,0 also' present in addition to fission products, Preliminary laboratory tests have been conducted by LASL c. on the solubility characteristics. An initial solubility of 12 microcuries was noted in the first seven days. Following that no release was found for the next five months. d. It is planned that this program will extend over a period of one year starting in FY 1972. e'. A general objective of the program is to evaluate the consequences of the entry to the ocaan environment of a U-ZrH fueled SNAP device. The ocean tests introduce temperature, tidal current, and biotic effects not available in the laboratory. 2. Test Site Description a. The program will be carried out at the Marine Environmental Test Station, located on the protected (mainland) side of San Clemente Island. The island, itself, is located approximately 60 miles from the nearest mainland. Figure 1 shows the location of San Clemente Island with respect to the Los Angeles area and the 1 407L_

n .O v other channel islands. - Also shown on Figure 1 is the north end of the island where all of the f acilities to be used by this project are located. San Clemente Island is under the sole jurisdic' tion of the Naval Undersea Research and Development Center. Entry to the island is restricted to personnel authorized by the Navy. b. The emplacement area will be the shallow water just off shore of the Marine Environment Test Station site, at North Light Harbor. The waters contiguous to the North Light Harbor are not normally used for projects other than those conducted at the Marine Environment Test Station. The Test Area is shown in Figure 2. 3. Test Program a. The test program involves immersion of 2 of the discs in ocean bottom material (sand, mud, organic material) in an exposure chamber which will be implanted on the ocean bottom at about a 50 foot depth of water. A sketch of the exposure chamber is shown in Figure 3. At 6 month intervals a sample will be removed and shipped back to LASL. b. No water will be circulated through the exposure chambers during the test. The chambers will be vented to the ocean to permit convection interchange of sea water and biotic material between the chamber and the ocean. 4. Radiation Safety Measures Continuous monitoring by the RSO will be performed during a. removal of samplas from the shipping container, placement into the expsoure chambers and emplantment of the exposure chambers into the ocean environment. Measurements will include dose rates, contamination surveys and air sampling. All handling of samples will be with 4-foot tongs. Hand and body dose rates are expected to be of the order of 60 mr/hr or less during transfer and emplacement. b. All personnel involved in the handling and emplacement will wear film badges and pocket dosimeters. Appropriate protective clothing, including coveralls and gloves, will be worn by personnel handling the samples. Divers involved in the implantment will wear underwater thermolumnescent dosimeters. kth The work area will be posted as radiation area. c. d. Each time an exposure chamber is removed from the water, radiation and contamination control measures will be employed. The work area will be papered, the chamber will be monitored for radiation and contaminatios levels, and an area survey will be made upon completion. Upon removal from the exposure chamber a disc 2 eme + 4 eeba

/'s U -{J 'T ~ will be packaged in accordance with the Department of Trans-portation requirements and shipped to LASL. c. The Radiological Safety Officer will be present for monitoring services during all emplacement, retrieval and packaging of sampics for shipment. f. Monitoring instrumentation available on site at San Clemente Island will include a Technical Associates Juno, a Navy AN/pDR-27, a Berkeley Side-Window GM Instrument, a Staplex air sampler and sample preparation and counting f acilities. g. Upon removal of a sample disc from an exposure chamber the contents of the chamber will be evaluated for fission product contamination and disposed of through a licensed waste disposal contractorjNf concentrations in excess of those listed in Column 2, Table II, Appendix B, 10CFR 20 are found. e s l l t { l i l 3 1 l (

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