Pu and U atom ratios and concentration factors in Reservoir 11 and Asanov Swamp, Mayak PA: An application of accelerator mass spectrometry

被引：13

作者：

Borretzen, P

Standring, WJF

Oughton, DH

Dowdall, M

Fifield, LK

机构：

[1] Norwegian Radiat Protect Author, N-1332 Osteras, Norway

[2] Agr Univ Norway, Dept Plant & Environm Sci, N-1432 As, Norway

[3] Australian Natl Univ, Dept Nucl Phys, RSPhysSE, Canberra, ACT 0200, Australia

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2005年 / 39卷 / 01期

关键词：

D O I：

10.1021/es049618p

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mayak Production Association, East Ural, Russia, was established to produce weapons-grade plutonium. Routine discharges and accidents at Mayak PA contaminated large areas, including the Techa River. The objectives of the present work were to study atom ratios for plutonium and, for the first time to our knowledge, uranium isotopes in water, soil, grass, and aquatic biota samples from Reservoir 11 and the Asanov Swamp, downstream from Mayak PA. Atom ratios (Pu-240/Pu-239, U-236/U-235, U-235/U-238) were determined using accelerator mass spectrometry to confirm radionuclide source characteristics and calculate activities and concentration factors for the studied samples. The lowest Pu-240/Pu-239 atom ratios were consistently found in Asanov Swamp samples (similar to0.019), indicating a major contribution from early discharges of weapons-grade Pu. Pu-240/Pu-239 atom ratios in Reservoir 11 were higher, indicating influence from more recent civil reprocessing. The presence of U-236 is usually indicative of fuel irradiation; U-236/U-235 ratios increase from weapons to civil sources. Our new data show that Asanov samples had lower U-236/ U-235 ratios than Reservoir 11 samples (0.0005-0.0045 for Asanov compared with 0.0074-0.0153 for Reservoir 11) in agreement with Pu results. Pu and U concentration factors calculated for vegetation and biota samples at Mayak were comparable with corresponding values found in the literature.

引用

页码：92 / 97

页数：6

共 13 条

[1] Isotopic Pu, U, and Np signatures in soils from Semipalatinsk-21, Kazakh Republic and the Southern Urals, Russia [J].

Beasley, TM ;

Kelley, JM ;

Orlandini, KA ;

Bond, LA ;

Aarkrog, A ;

Trapeznikov, AP ;

Pozolotina, VN .

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 1998, 39 (02) :215-230

[2] 236U in uranium minerals and standards [J].

Berkovits, D ;

Feldstein, H ;

Ghelberg, S ;

Hershkowitz, A ;

Navon, E ;

Paul, M .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2000, 172 :372-376

[3]

BORRETZEN P, 2001, THESIS AGR U NORWAY

[4] Radioactive contamination in the environment of the nuclear enterprise 'Mayak' PA. Results from the joint Russian-Norwegian field work in 1994 [J].

Christensen, GC ;

Romanov, GN ;

Strand, P ;

Salbu, B ;

Malyshev, SV ;

Bergan, TD ;

Oughton, D ;

Drozhko, EG ;

Glagolenko, YV ;

Amundsen, I ;

Rudjord, AL ;

Bjerk, TO ;

Lind, B .

SCIENCE OF THE TOTAL ENVIRONMENT, 1997, 202 (1-3) :237-248

[5]

CLACHER A, 1995, THESIS U MANCHESTER

[6] Accelerator mass spectrometry of plutonium isotopes [J].

Fifield, LK ;

Cresswell, RG ;

diTada, ML ;

Ophel, TR ;

Day, JP ;

Clacher, AP ;

King, SJ ;

Priest, ND .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1996, 117 (03) :295-303

[7]

IAEA, 1994, TECHN REP SER, V364

[8] Determination of U-236 in sediment samples by accelerator mass spectrometry [J].

Marsden, OJ ;

Livens, FR ;

Day, JP ;

Fifield, LK ;

Goodall, PS .

ANALYST, 2001, 126 (05) :633-636

[9]

Oughton D, 2001, RADIOACTIV ENVIRONM, V1, P47

[10] Plutonium from Mayak: Measurement of isotope ratios and activities using accelerator mass spectrometry [J].

Oughton, DH ;

Fifield, LK ;

Day, JP ;

Cresswell, RC ;

Skipperud, L ;

Di Tada, ML ;

Salbu, B ;

Strand, P ;

Drozcho, E ;

Mokrov, Y .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (10) :1938-1945

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