PM-82-114, RO 50-321/1979-021,Revision 5.Provides Updated Data on Tritium Levels in Groundwater Samples Taken from Locations Where Average Value Over Third Quarter of 1982 Exceeded Samples Per ETS Table 3.2-3

RO 50-321/1979-021,Revision 5.Provides Updated Data on Tritium Levels in Groundwater Samples Taken from Locations Where Average Value Over Third Quarter of 1982 Exceeded Samples Per ETS Table 3.2-3

ML20077K178
Person / Time
Site:	Hatch
Issue date:	11/23/1982
From:	Nix H GEORGIA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
PM-82-1140, RO-50-321-1979, NUDOCS 8212090379
Download: ML20077K178 (4)

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Edwin 1. Hatch Nuclear M.n e r 6 a9: 58 November 23, 1982 PM-82-ll40 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 Environme. ital 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 submittal of this LER.

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October 29, 1982 SUPPLEMENTAL NARRATIVE

SUMMARY

TO LER 50-321/1979-021, REV. 5 EDWIN I. HATCH NUCLEAR PLANT - HATCH 1 NON-ROUTINE RADIOLOGICAL ENVIRONMENTAL OPERATING ANOMALOUS MEASUREMENT REPORT 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 third quarter of 1982 exceeded 3.0 E4 pCi/l which is the report level for tritium in environmental water samples according to Table 3.2-3 of the ETS. There continues to be no significant impact on the public health and safety due to these readings which exceeded the report level. A3 reported previously, any releases to unrestricted areas are through the outfalls of the drainage system; such releases continue to be small and result in insignificant doses to the public.

The tritium levels found in all samples gathered at the reportable locations during the third quarter along with a complete listing of the past average quarterly levels for those locations are presented in Tables 1 and 2. Table 1 provides data for the samples collected in the CST-1 area and Table 2 provides data for the samples collected near the NE corner of the Unit 1 turbine building.

The source of the tritium in the CST-1 area is the leakage from the condensate transfer pumps and associated plumbing. During 1980, dikes were erected around the pumps to preclude water from any future leaks from entering the ground. In July 1981 and again in January 1982 the dike floor became flooded when leaks occurred to one of the condensate transfer pumps. Soon after each of these incidents the tritium levels in nearby groundwater samples increased sharply.

To stop the dike leakage all joints were filled with a sealant and an epoxy paint was applied to the floor and to the inside walls to several feet above the floor. This water proofing treatment was also applied to the CST-2 dike. This work was completed during the third quarter. Leak tests have been performed and the results indicate that the dikes are sealed..

Supplement October 29, 1982

.- 's Table 1 Tritium Levels at Affected Locations in CST-1 Area pCi/l Qtr or Date P16 T18 QUARTERLY AVERAGE 2-78 1.44E5 3-78 1.54E5 4-78 1-79 1.26 E5 2-79 9.60 E4 6.68 E4 3-79 7.08 E4 7.61 E4 4-79 6.38 E4 6.84 E4 1-80 9.18 B4 8.71 E4 2-80 1.12 E5 6.36 E4 3-80 dry 7.61 E4 4-80 dry 5.91 E4 1-81 6.22 E4 8.29 E4 2-81 5.73 E4 7.77 E4 3-81 8.55 E4 1.27 ES 4-81 dry 1.56 E5 1-82 1.26 E5 1.29 E5 2-82 dry 1.56 ES 3-82 1.64 ES 9.33 E4 During Third Quarter 1982 7/13 1.47 E5 7/14 dry 7/20 1.76 E5 9.05 E4 7/27 1.51 ES 8/12 1.18 ES 8/18 dry 9/21 dry 1.76 E4 Supplement October 29, 1982

Table 2 Tritium Levels at Affected Locations Near NE Corner of the Unit 1 Turbine Building pCi/1 Otr or Date N9B T3 QUARTERLY AVERAGES 3-78 3.45 E3 4-78 4.49 E3 1-79 3.42 E4 2-79 8.50 E4 1.19 E4 3-79 1.38 E5 1.28 E4 4-79 1.71 E5 2.01 E4 1-80 1.73 E5 2.47 E4 2-80 1.79 ES 3.92 E4 3-80 1.64 ES 4.60 E4 4-80 1.13 ES 4.29 E4 1-81 1.06 E5 4.80 E4 2-81 8.17 E4 5.55 E4 3-81 8.47 E4 4.74 E4 4-81 9.77 E4 5.29 E4 4

1-82 4.20 E5 1.10 ES 2-82 4.42 E5 1.13 E5 3-82 3.64 E5 4.34 E4 During Second Quarter 1982 7-13 4.20 ES 4.67 E4 7-20 3.64 ES 3.51 E4 7-27 3.39 E5 2.12 E4 8-10 4.26 ES 4.54 E4 8-12 4.28 E4 8-24 3.82 ES 4.89 E4 9-17 3.32 E5 5.28 E4 9-21 2.88 ES 5.46 E4 Supplement October 29, 1982 4

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