ML20069D766

Errata to Pulstar Annual Rept to Usnrc,Jul 1981-June 1982, Environ Radiation Surveillance Rept for 811005-820820

ML20069D766
Person / Time
Site:	North Carolina State University
Issue date:	08/20/1982
From:	North Carolina State University, RALEIGH, NC
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ML20069D754	List: ML20069D752 ML20069D766
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NUDOCS 8209220264
Download: ML20069D766 (5)

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NCSU'FULSTAR Annual Report Shction 6 7.5.(h) s.

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EYVIROIWINTAL RADIATION SURVE' LIJuNCE REPORT

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FOR THE PERIOD 10/5/81 7 '- 8/20/82

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1. INTRODUCTION Environmental radioactivity levels in the vicinity of the North Carolina State University campus have been observed to remain at low levels during the current reporting interval. The available data for this period is greatly reduced in comparison to the previous reporting period due to numerous technical problems with the laboratory instrumentation.

2. AIR MONITORING All the data in this report related to air monitoring is given only in terms of gross beta activity as determined from Millipore air filters (Table 2.1). Due to recurrent difficulties with instrumentation, no gamma spectral data is available.

3. Monthly analyses of pasteurized cow's milk from the University Creamery have consistently exhibited levels of Sr-90 that are well within the maximum permissible concentrations (Table 3.1). The available data on I-131 activity is limited to one sample counted in October 1982. The I-131 activity in this sample was found to be below its detection limit of 2.0 picocurie liter-1

4. SURFACE H O 2

The available data on surface water activity is limited to the months of April, May, and June. The indication from this data is a very low level of gross alpha and beta activity (Table 4.1).

5. SOIL Soil samples were collected at four campus locations and counted for the Radiation Protection Office by the Radiation Protection Section of the Division of Human Resources. The results indicate no significant levels of radioactivity (Tables 5.1 and 5.2).

6. VEGETATION Soybeans were collected from the University Farm and e grass sample was taken for analysis. These samples were counted by the Radiation Protection Section of the Division of Human Resources. The results indicate no signifi-cant concentrations of radionuclides (Tables 6.1 and 6.2).

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TABLE 2.1 LOCATION OF AIR MONITOR STATIONS SITE DIRECTION DISTANCE ELEVATION (meters) (meters)

Broughton Southwest 125 - 17 David Clark Labs West 500 - 18 Library Northwest 192 + 11 Riddick Southwest 99 - 14 Withers Northeast 82 -

6 Direction - Direction from PULSTAR Reactor Stack Distance - Distance from PULSTAR Reactor Stack fElevation__ Elevation _relativeto_the_topofthePULSTARReactorStack___

TABLE 2.2 AERIALLY TRANSPORTED GROSS BETA ACTIVITY (fCim~ i 1 o)

Sampling Locations Date Broughton DCL Library Riddick Withers 1981-10/5-10/9 25.115.0 24.014.7 37.815.4 --

32.315.2 10/12-10/16 25.714.8 23.714.5 22.514.5 44.515.4 34.915.0 10/19-10/23 23.814.6 27.014.6 25.614.6 21.614.3 27.114.6 10/26-10/30 2.713.8 17.814.2 3.813.6 14.714.1 ---

11/2-11/6 35.715.2 36.515.0 29.014.8 23.414.4 35.715.1 11/9-11/13 26.214.9 33.115.0 67.116.5 ---

33.115.0 11/16-11/20 25.614.8 23.514.5 ---

21.814.3 35.515.1 11/23-11/27 34.315.3 31.915.0 16.114.4 27.214.7 18.514.5 11/30-12/4 38.415.3 39.315.1 29.514.7 34.614.9 34.415.0 12/7-12/11 20.314.6 15.314.2 5.213.8 27.414.7 35.715.1 12/14-12/18 31.115.0 26.514.6 29.014.8 54.415.8 28.214.8 12/21-12/28 25.414.6 37.014.9 59.316.0 28.714.5 28.914.6 1982-1/4-1/8 26.014.9 23.414.5 21.614.3 33.015.0 27.014.6 1/11-1/15 25.214.5 36.814.9 27.515.7 28.914.8 23.214.4 1/18-1/22 39.015.0 29.614.7 27.214.6 34.715.0 21.414.2 1/25-1/29 25.514.6 32.015.0 32.115.0 34.215.3 35.515.1 2/1-2/5 20.114.5 31.214.5 28.514.5 28.814.6 27.214.6 2/8-2/12 33.114.4 21.014.0 38.214.5 25.614.1 24.314.2 2/15-2/19 34.214.3 35.314.5 38.614.7 24.314.0 22.414.2 j 2/22-2/26 23.514.9 29.714.2 32.714.4 21.914.0 35.114.5 3/1-3/5 31.114.4 39.414.4 43.715.0 40.114.7 39.714.7 3/8-3/12 33.814.3 26.114.0 33.014.4 45.314.8 41.114.7 3/15-3/19 30.614.3 50.015.1 27.414.2 23.114.2 23.014.1 3/22-3/26 45.614.9 32.914.3 31.014.3 27.914.1 21.713.9 4/5-4/9 30.514.3 29.814.2 32.914.4 40.014.7 22.214~1 4/12-4/16 20.014.5 32.115.0 34.015.2 28.914.5 27.014.5 4/19-4/23 39.215.2 34.115.1 45.215.4 43.715.5 34.714.5 4/26-4/30 47.115.1 22.614.1 26.814.3 37.214.9 29.014.4 '

5/3-5/7 28.314.9 27.714.9 22.914.5 40.015.2 32.814.4 5/10-5/14 39.715.4 23.214.5 43.115.3 51.315.7 39.014.2 5/17-5/21 28.214.8 27.314.6 31.415.0 40.015.4 41.015.3 5/24-5/28 37.715.4 35.515.2 23.014.5 40.215.2 45.315.4 5/31-6/4 31.215.0 36.515.2 34.815.2 48.415.2 43.215.5 6/7-6/11 34.014.5 39.614.8 38.714.6 46.015.5 36.815.1

I TABLE 2.2 AERIALLY TRANSPORTED GROSS BETA ACTIVITY (fCi m~ lo), continued Sampling Locations Date Broughton DCL Library Riddick Withers l 6/14-6/18 37.215.4 36.114.5 21.113.4 29.614.0 42.014.8 6/21-6/25 46.015.4 41.914.8 26.214.1 26.014.0 39.214.5 6/28-7/2 33.114.4 28.514.2 31.114.3 29.914.1 32.014.2 7/5-7/9 40.014.7 39.414.5 30.114.0 29.714.1 35.114.5 7/12-7/16 30.414.8 50.015.7 30.514.9 23.413.8 22.014.8 7/19-7/23 40.314.5 37.114.8 38.514.6 36.914.7 40.014.8 7/26-7/30 40.115.2 41.014.5 37.215.4 39.614.7 37.815.2 8/2-8/6 41.014.5 39.715.0 50.215.3 40.014.7 40.215.2 8/9-8/13 31.614.3 40.315.3 30.913.9 40.314.8 41.214.7 8/16-8/20 35.214.6 32.714.3 32.914.4 38.814.6 39.014.7 TABLE 3.1 Sr-90 IN COW'S MILK (pCi 1~ 1 lo)

Date Activity (pCi E~ 1 lo)

Dec 1981 3.6 1 0.52 1982 Jan 3.4 1 0.47 Feb 4.2 1 0.53 Mar 3.4 1 0.47 Apr 3.3 1 0.42 May 3.3 1 0.42 June 3.51 1 0.52 TABLE 4.1 SURFACE H O 2

Date Location Gross Beta Gross Alpha (pCi 1~ 1 lo) (pCi 1~ i lo)

April ON 4.02 1 0.43 0.18 i 0.07 OFF 3.01 1 0.34 0.13 1 0.08 May ON 2.91 1 0.33 0.17 1 0.07 0FF 2.72 1 0.32 0.15 1 0.07 June ON 2.83 1 0.32 0.19 1 0.08 OFF 2.74 1 0.32 0.14 1 0.08 TABLE 5.1 SOIL SPECIFIC ACTIVITY (pCi gram ~ 1 lo)(Gross Alpha and Beta) ampus fg Date Alpha Beta ~

9 1 1 North 3/2/82 (2.1 1 1.2) x 10 (1.7 1 0.7) x 10 1 1 South 3/2/82 (1.5 1 1.8) x 10 (3.0 1 3.3) x 10 1 1 East 3/2/82 (1.6 1 1.0) x 10 (2.? 1 0.7) x 10 West 3/2/82 7.6 1 9.2 6.6 1 12.5

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l TABLE 5.2 SOIL SPECIFIC ACTIVITY (pCi gram- 1 lo)(Gamma Emitters)

North Campus - 3/2/82 Nuclide Activity No gamma count ---

South Campus - 3/2/82

-1 Cs-137 (6.3 1 0.2) x 10 K-40 7.2 1 0.3

-1 l Ra-226 (6.6 1 0.3) x 10

-2 U-235 (7.6 1 5.4) x 10

-1 Th-232 (7.1 1 0.5) x 10 East Campus - 3/2/82

-1 Cs-137 (3.0 1 0.2) x 10 K-40 12.7 1 0.4

-1 Ra-226 (7. 7 1 0.3) x 10

-1 Th-232 (9.3 1 0.6) x 10 West Campus - 3/2/82

-2 Cs-137 (6.7 1 1.3) x 10 K-40 7.6 1 0.3

-1 Ra-226 (5.4 1 0.3) x 10

-1 U-235 (1.5 1 0.5) x 10

-1 Th-232 (6.6 1 0.5) x 10 TABLE 6.1 SOYBEANS SPECIFIC ACTIVITY (pCi gram- 1 lo) (Gross Alpha and Beta)

(University Farm)

Gross a Gross 8'

< 0.6 11.6 1 2.7 TABLE 6.2 GRASS SPECIFIC ACTIVITY (pCi gram- 1 lo)(Gross Alpha and Beta)

(West Campus)

Gross a Gross B_

-1 (5.6 1 4.7) x 10 3.2 1 1.1