ML19322A262
| ML19322A262 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/26/1979 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| GQL-0229, GQL-229, NUDOCS 7903070248 | |
| Download: ML19322A262 (3) | |
Text
.
qi;;)_._/27L/
/
f
/
/
METROPOLITAN EDISON COMPANY susuciaav or ceuensvowc uriuries conmA ric,,'
POST OFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929 3601 February 26, 1979 GQL 0229 Mr. B. H. Grier, Director Office of Inspection & Enforcement, Region i U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 Docket No. 50-289 Operating License No. DPR-50 Nonroutine 10 Day Environmental Report In accordance with Section 5.6.2.2.a(1) of the Environmental Technical Specifications for our Three Mile Island Nuclear Station Unit 1 (TMI-1),
we are submitting notification of a measured level of radioactive material which exceeded ten times the control station value for a quarterly composite of weekly grab samples representing the fourth quarter of 1978.
Sincerely, 7
J. C. Herbein Vice President-Generation JGH:DGM:tas Enclosure cc:
Ms. Margaret Reilly Chief Div. of Reactor Review Pa. Department of Environmental Resources Fulton National Bank Building Harrisburg, Pennsylvania 17120
%00 L 5g
\\
7003070 A Y8
s..--,,e y,:
ww-Metropolitan Edison Company Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Do ket No. 50-289 Operating License No. DPR-50 Nonrcutine 10-Day Environmental Report Report of an Anomalous Measured Level of Radioactive Material in the Environment Descriotion of Measured Level Met-Ed was informed by their consultants on February 21, 1979, that the quarterly composite of weekly grab samples of river water collected downstream of TMI-l showed Tritium levels in excess of ten times the background level. Quarterly composites of weekly grab samples of river water collected approximately 0.5 miles '. Station 9A2) and 1.5 miles (Station 9B1) downstream from the TMI-l dis-charge showed Tritium concentrations as follows:
9A2 - 19601130 pCi/l 9B1 - 1980 i 130 pCi/1 These values are greater than ten times the control station value of 120 1 90 pCi/1.
The monthly composite sample analyses of Tritium for December were above the reporting level at locations 9A2 and 9Bl. These Tritium levels caused the quarterly limit to be exceeded.
Possible Cause This occurrence was probably due to the location and sampling methods at the collection points 9A2 and 9Bl. These are not representative sampling locations in that complete mixing from the discharge can not occur prior to passing the locations. In addition, the grab sample is not as representative a sampling method as an automatic compositor. It is believed that the combination of the above conditions resulted in a sample level which was not representative of the average quarterly lavel of Tritium.
Analysis of Measured Levels It has been determined that neither the health nor safety of the public was threatened by the activity levels represented by these sample results in that:
The level of Tritium activity was approximately 1/1000th of the Maximum a.
Permissible Concentration given in 10 CFR 20 Appendix B.
- b. -The level of Tritium activ. ty at the next downstream sampling location from location 9B1 (2.3 miles SSE of the site, 8C2) was l'0 i 80 pCi/1. This
- sample was collected via an automatic compositor and was at a normal back-ground level. The Tritium ac.ivity at the nearest downstream source of drinking water (15 miles SE ot the site) was 420 1 80 pCi/1.
The Tritium activity level for this sanpli2g location was well within the normal back-ground fluctuation.
No Technical Specification radioactive effluent release limit was exceeded.
c.
l l
l l
l I
l l
A c
. Torrective Action This discharge of effluents from the Liquid Waste Evaporator Condensate Tank is a normal process associated with and dependent on unit operations as described in TMI-l Final Safety Analysis Report, and therefore no changes to the unit operations are warranted.
Sampling and analysis of river water will continue in accordance with TMI-l Environmental Technical Specifications.
.