ML20040C604

Submits Environ Info in Response to Telcon.Tritium Releases to Sanitary Sewers for 1975-1981 & Sensitivity of Environ Monitoring Listed

ML20040C604
Person / Time
Site:	National Bureau of Standards Reactor
Issue date:	01/26/1982
From:	Rozier Carter COMMERCE, DEPT. OF
To:	John Miller Office of Nuclear Reactor Regulation
References
NUDOCS 8201290073
Download: ML20040C604 (2)

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N tir ci Cureau cf Ctandard3 UNITE 3 CTATED CEPARTMENT CF CIMMET.CE

/ Washington, D.C. 20234

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Mr. James 'R.' Miller, Chief '%f Standardization and Special Projects Branch g, .y /,9 fID 72

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Division of Licensing ti. 5. Nuclear Regulatory Commission ,

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Subject:

Disironmental Infonnation, Docket No. 50-18.4, License -

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In cresponse to a telephone icquiry from your staff, the following information is subniitted.b .

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-1. Tritium Re16ase to the Sanitary Sewer

! _ Since insta'llition of-the stain'less steel heat exchan'gers in 1975, the average'tritji:m release to the Sanitary sewer has been approximately 0.84 Ci .a.nnually. ,The b'reakdown for each of the years is as follows:

J Year Tritium Release, Ci

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0.67-1976 ls 0.49 1977 ~s. ' -

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1978 '

j 1.34 s  % -

s 1979 .4 ' l.69 . '~.' s q 1980 { 'J ,

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1981 ' $ .~

'  % 0.53c -

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! 2. Sensitivijy of Envircnmental Monitoring <

a. Soil and Grass Sempbg \['u d 5 -

Mingmn, detectable, level for strontium-90 is better than 10 pCi/g which is below background' levels. ,

b. Water Samp1[ing i '

-3 Minimum detectable level for tritium is 2XTO'7uti/mL (MPC=3X10 Ci/mL)

Minimum detectable level for hther prominent radioisotopes 2 (sodium-24, manginese-56, iron-59, cobalt-60', copper-54; niobium-95, zirconiume95, ruthenium-103, iodine-131, cesium-137, barium-140, l N ' ' lanthenum-140, 9erium-141, praseodymium-143, and cerium-144) is better than 10L ci/mL u whit.h is less than 1% of MPC.

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c. External, Background fionitoring

> fiinimum detectable level is 4 mrem or less per TLD.

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Sincerely, ft/& .$' k k Robert S. Carter Chief, Reactor Radiation Division

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