ML18029A464

Forwards RH-81-1-BF-1, Radiological Impact Assessment, Browns Ferry Nuclear Plant,Jul-Dec 1980. Algorithm to Determine Population Dose to Liver Revised to Include Doses from Recreational Activities

ML18029A464
Person / Time
Site:	Browns Ferry
Issue date:	11/05/1981
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18029A465	List: ML18029A464 ML18029A466
References
NUDOCS 8504100337
Download: ML18029A464 (6)

Text

TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNkQB9755G~ O N A I Loti+A, GEQROlA IIOO Chestnut Street Tower II

. November 5, 1981 hl Nov 9 Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission 'ear Office of Inspection and Enforcement Region II 101 Marietta Street;, Suite 3100 Atlanta, Georgia 30303 Mr. O'Reilly:

SEMIANNUAL RADIOLOGICAL IMPACT ASSESSMENT REPORTS JULY 1980 TO JUNE 1981 BROWNS FERRY NUCLEAR PLANT UNITS 1-3 - DOCKET NOS. 50-259, 50-260, AND 50-296 '- OPERATING LICENSES DPR-33, DPR-52, AND DPR-68

References:

1. Letter, L. M. Mills to J. P. O'Reilly, "Semiannual Radiological Impact Assessment Report - Browns Ferry Nuclear Plant - July 1 through December 31, 1980yn February 27, 1981.

2. Letter, L. M. Mills to J. P. O'Reilly, "Semiannual Radiological Impact Assessment Report - Browns Ferry Nuolear Plant - January 1 through June 30, 1981,~e August 28, 1981.

While making improvements to the analytical code we use for estimating doses from liquid effluents from Browns Ferry Nuclear Plant (BFNP), the algorithm which determines the population dose to liver was revised to include doses from recreational activities. A table is enclosed which compares the recently calculated values to those previously reported.

Although the changes are fairly small (less than 10 percent), we believe mention is warranted because the liver has been reported as the critical organ for BFNP.

Before July 1980 doses to liver were not specifically calculated.

Therefore, only the doses reported in references 1 and 2 are affected by the code revisions.

To the best of my knowledge, I declare the statements contained herein are complete and true.

Very truly yours, TENNESSEE VALLEY AUTHORITY 850y PDR 3>

CK aiii05 R 05000259 PDR I

L. M. Mills, Ma ager Nuclear Regulation and Safety Enclosure cc: See page 2 08'NCIAL COPy g/- B,G3 An Equal Opportunity Employer

0 e ll t I

\

Mr. James P. O'Reilly, Director November 5, 1981 cc (Enclosure):

Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Director Office of Management and Program Analysis U.S. Nuclear Regulatory Commission Washington, DC 20555 Director Alabama Water Improvement Commission Public Health Service Building Montgomery, Alabama 36130 Chief, Compliance Branch Enforcement Division Environmental Protection Agency Region IV 305 Courtland Street, NE Atlanta, Georgia 30308

0 ~"

nclosure Po ulation Dose (Or an-Rem) to Liver for Browns Ferr Nuclear Plant Com arison of Previousl Re orted Values and Revised Values Dose to Liver (Or an-Rem)

Time Period ~Ori iaal Reviseda Third Quarter 1980 3.7 3.9 Fourth Quarter 1980 7 7 8.0 First Quarter 1981 4.1 4.1 Second Quarter 1981 7.5 7.9

a. The revision incorporates addition of doses calculated to result from recreational activities in and near the Tennessee River.

b. The typographical error in the text of the report (page 5, paragraph 3) gives this value as 7.2. The value of 7.7, as found in table 14, is correct.

0 j

J J