ML20199E774

Erratum to Semiannual Radioactive Effluent Release Rept for Oct-Dec 1985,correcting Results of 1985 Land Use Census

ML20199E774
Person / Time
Site:	River Bend
Issue date:	12/31/1985
From:	GULF STATES UTILITIES CO.
To:
Shared Package
ML20199E746	List: ML20199E758 ML20199E774 RBG-23862, Forwards Addendum to Semiannual Radioactive Effluent Release Rept for Oct-Dec 1985,providing Info on Sr-90,Sr-89 & Fe-55 Releases.Erratum to Semiannual Radioactive Effluent Release Rept for Oct-Dec 1985 Also Encl
References
NUDOCS 8606240061
Download: ML20199E774 (3)

Text

._ . - -

SEMIAlWUAL RADI0 ACTIVE EFFLUENT RELEASE REPORT ERRATtM 4

FACILITY: River Bend Station-Unit 1.

LICENSEE: Gulf States Utilities Co.

REPORT PERIOD: Octooer 31, 1985 Through December 31, 1985 This erratum is submitted under River Bend Station (RBS)

License Number NPF-47 and provides a correction concerning the results of the 1985 Land Use Census as

described in the Quarter 3/4 1985 RBS Semiannual Radioactive Effluent Release Report,Section XII,' page 12.

The report originally stated:

XII. Land Use Census The Land Use Census did not identify any 4

location (s) that would yield a calculated dose or dose commitment greater than the values calculated

in Technical Specification 4. for the reporting period 10/31/85 through 1,11.2.3 2/31/85.

After submittal of the report, the 1985 Land Use Census was re-examined and it was discovered that several

receptor locations had changed from those locations originally listed in the RBS Environmental Report -

Operating License Stage (RBS ER-OLS). The RBS ER-OLS locations form the basis for the ODCM maximum receptor locations.

Specifically, the residence location moved in closer to the site in the ENE, SSE, WSW, and WNW sectors which would possibly result in higher atmospheric dispersion and deposition factors and thus higher calculated doses or dose commitments:

1 l

l 8606240061 860610 PDR R

ADOCK 05000458 PDR i

l

RESIDENT ER-OLS* 1985 Land Use Census ENE 1600m 1400m SSE 4200m 1700m WSW >5000m 4200m WNW >5000m 4500m However, since the limiting sector is the NW sector with no substantive change in receptor location, inhalation pathway and noble gas immersion dose calculations for the maximally exposed resident were not affected.

The garden location moved in closer to the site in the NE, WNW, and NNW sectors which would also possibly result in higher atmospheric dispersion and deposition factors and thus higher calculated doses or dose commitments:

GARDEN ER-OLS* 1985 Land Use Census NE 2000m 1500m WNW >5000m 960m (on-site garden)

NNW 3100m 3000m

• ER-OLS Table 2.7-115 i

i

, - - - - . ~ . - - - - - - - - , - - - - -

In this case, the limiting sector for the garden is in the WNW sector which did indicate a decrease in the distance from the receptor to the site. Using the.

original garden location at the 1260 m NW sector, the dose calculated to meet Technical Specification 4.11.2.3 for the 4th quarter of 1985 would be 5.96 x 10-5 mrems.

Using the 1985 Land Use Census garden location of 960m in the WNW sector, the calculated dose for the same quarter would be 9.27 x 10-5 mrems. This change in garden location would not, however, result in a substantially higher overall dose in comparison to the quarterly and yearly allowable limits of 7.5 mrems and 15 mrems, respectively. Both doses were calculated using average annual historical atmospheric dispersion l factors for the specific locations rather than the real time 4th quarter 1985 factor presented in the 1985 Semiannual Radiological Effluent Release Report. This new garden location along with revised X/Q and D/Q values will be inserted into Table F-1 of the RBS Offsite Dose Calculation Manual prior to submission of the 1986 Quarters 1 and 2 Semiannual Radioactive Effluent Release Report.

No other changes in receptor locations were noted that would result in higher doses or dose commitments higher than those currently being calculated to demonstrate compliance with Technical Specification 4.11.2.3.

i . . .