ML19350C055
| ML19350C055 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/20/1981 |
| From: | Hovey G METROPOLITAN EDISON CO. |
| To: | Barrett L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19350C056 | List: |
| References | |
| LL2-81-0077, LL2-81-77, NUDOCS 8103300257 | |
| Download: ML19350C055 (2) | |
Text
9 Metropohtan Edison Company 7.
Pos: Office Eox 480 4~ ('
Middletown, Pennsylvania 17057 gj q
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Writer's Direct Dial Number March 20, 1981 LL2-81-0077 TU D
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Attn:
Mr. Lake Barrett, Deputy Director fq
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Dear Sir:
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,'4 f Three Mile Island Nuclear Station, Unit II (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Three Mile Island Groundwater Monitoring Program The following gro'mdwater monitoring data are actached:
1.
Cocputer tables of all tritium data up to and including January 28, 1981, 2.
Co=puter tables of ga==a scan data up to and including February 25, 1981, 3.
Individual computer graphs of tritium concentration for each well (these graphs now have the same concentration and time scales),
4.
A graph showing the gn==a scan results for Monitoring Well MW-2, and 5.
A composite drawing showing all well locations v4* h a graph of the tritium concentration for each well.
In future reports, we also plan to provide well water level data in a
=anner similar to that of the tritium data.
There were no substantial changes in the tritium concentrations over the reporting period. However, tritium concentrations continue to trend down in MW-2 and up in MW-3.
This most likely indicates an area g
stablization af ter the extended pump testing on MW-2 in August and M
Septemeber of 1980.
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The ga==a scan data for the MW-2 sa=ple of February 11, 1981 showed j
higher cesiu=-134/137 values than previously =easured.
The presence f
'J of cobalt-60, which was also detected for the first time, indicatas
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that the source of conta=ination is the SWST. Subsequent saples taken on February IS and 25 1981 show reduced levels of cesiu= and cobalt (see attached graph). We are continuing to evaluate this behavior
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1 Mr. Lake Barrett LL2-81-0077 l
and we will update our findings in subsequent Groundwater Monitoring Program reports.
- 1 Sincerely,
- l i-G. K. Hovey Vice-President and Director, TMI-2 i
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GKH:JJB:djb Attachment cc:
Dr. Bernard J. Snyder, Progra::: Director-TMI Office r
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