Difference between revisions of "ML20023C305"

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Supplemental Narrative Summary to Rev 5 to RO 50-321/1979-021.Updated Data on Tritium Levels in Groundwater Samples During First Quarter 1983 Encl.No Radionuclides Above Background Identified
ML20023C305
Person / Time
Site:  Southern Nuclear icon.png
Issue date: 05/02/1983
From: Nix H
GEORGIA POWER CO.
To: Oreilly J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
Download: ML20023C305 (3)


Text

. _ _ _ _ _.

Georgia Powtr Comptny Post Offics Box 439 4

Baxley, Georgis 31513

- Telephone 912 367-7781, ' O il E GlC N 3 912 537-9444, a.TA. GEOPGIA Edwin 1. Hatch ! la May 2, 1983 GM-83-451 PLANT E. I. HATCH Licensee Event Report Docket No. 50-321 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region II, Suite 3100 101 Marietta Street Atlanta, Georgia 30303 ATTENTION: Mr. James P. O'Reilly Pursuant to Section 6.9.1.9.d of Plant Hatch Unit One Technical Specifications and Sections 3.2 and 5.7.2 of the Hatch Unit One Environmental Technical Specifications, please find the attached Supplemental Narrative Summary to Reportable Occurrence Report No. 50-321/1979-021, Rev. 5. The attached report provides supplemental information to the previous submitt- of this LER.

H. C. Nix General Manager HCN/SBT/abb xc: R. J. Kelly G. F. Head

, J. T. Beckham, Jr.

P. D. Rice K. M. Gillespie S. B. Tipps R. D. Baker Control Room '

Document Control '

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SUPPLEMENTAL NARRATIVE

SUMMARY

TO LER.50-321/1979-021, REV. 5 EDWIN I. HATCH NUCLEAR PLANT - Hatch 1 NONROUTINE RADICLOGICAL ENVIRONMENTAL OPERATING i ANOMALOUS MEASUREMENT REPORT l

} This report which supplements the previous .submittals on LER 50-321/1979-021 provides updated data on tritium levels in groundwater ;

samples taken from locations where the average value during the first

]' quarter of 1983 exceeded 3.0 E4 pCi/1 which is the report level for tritium in environmental water samples according to Table 3.2-3 of the 4

ETS. There continues to be no significant impact on the public health and safety due to these readings which exceeded the report level. As reported previously, any releases to unrestricted areas are through the- outfalls of the drainage system; such - releases continue to be small and result in nonsignificant doses to the public.

i High tritium levels have been found in groundwater samples taken from i' two separate areas of the plant yard - an area centered just south of-CST-1 and an area about the north side of .the Unit 1 turbine ,

building. These areas appear to be _ essentially unrelated to each other in that the causes of the high tritium levels are different and there appears not to be a good hydraulic connection between the two areas. t There were three reportable locations (test holes P16, T12 and T18) for the - CST-1 area for the fourth quarter of 1982. During the first quarter of 1983, test holes P16 and T18 were dry and the average tritium level at T12 dropped below the report level to 1.38 E4 pCi/1.

There were ' four reportable locations (test holes N98, T3 and T4, and

! the steam pipe chase for the auxiliary boiler) for the area about the north side of the Unit I turbine building for the fourth quarter of E

1982. During the first quarter of 1983, the average tritium levels at T3 and the steam pipe chase dropped below the report level and no sample was collected at T4. The average levels at T3 and the pipe

! chase were 2.76 E4 and 6.59 E3 pCi/1, respectively.

l The tritium levels found in all samples gathered at N9B, the only reportable location for the first quarter of 1983 along with a complete listing of the past average quarterly levels at this location are presented in Table 1.

. Gamma scans were run on each sample collected in the steam pipe chase. No radionuclides above background were found.

i

s . .

Table 1 High Tritium Levels About the North Side of the Unit 1 Turbine Building pCi/1 QUARTERLY AVERAGES Quarter or Date N9B 3-78 3.45 E3 4-78 4.49 E3 1-79 3.42 E4 2-79 8.50 E4 3-79 1.38 ES 4-79 1.71 E5 1-80 1.73 E5 2-80 1.79 ES 3-80 1.64 ES 4-80 1.13 E5 1-81 1.06 E5 2-81 8.17 E4 3-81 8.47 E4 4-81 9.77 E4 1-82 4.20 E5 2-82 4.42 ES 3-82 3.64 E5 4-82 3.12 E5 1-83 3.64 E5 During First Quarter 1983 1/11 3.38 E5

-1/25 3.62 E5 2/08 3.57 ES 2/22 3.28 ES 3/08 3.78 ES 3/22 4.21 ES l

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