ML19210A230
| ML19210A230 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/27/1975 |
| From: | Colitz J METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19210A227 | List: |
| References | |
| NUDOCS 7910240942 | |
| Download: ML19210A230 (2) | |
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(y,, t f.V3 ROUTINE TEPORT 475-03
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%5" A;72 METROPOUTAN EDlSOt; CCMPANY svassounvoreenenavuaucurrurossccaronarion TEt.EPHONE 717-944 4041 POSTOFFICE BOX 480 MIDDt.ETOWN. PENNSYLVANIA 17CS7 June 27, 1975 Y' h.
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Mr. J. P. O'Reilly P
b'h p' W 'j Directorate of Regulatory Operatians E
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1 Region I G31 Park Avenue King of Prussia Pa. 19406 Operating 1.icense DPR-50 Docket 50-289 Unplanned release of radioactive material at THI thmugh the plant Subject-vent from the Auxiliary Bu(1 ding..
Dear Mr. 0*Pell1y,
11rfs telegram is to confinn the conversation between Bert Davis (Region I -
tl2C), and J. G. lierbein (Manager, Generation Operations' " Nuc] ear) at 123G hours 1
27 June,1975.
On 25. June. starting at 0227. Inadvertent sporadic noble gas twieases occurred over a fourteen (14) hour period. Toe total time of the releases was sevan (7) hours and six (6) cinutes.
Due to the fact that the level of the activity released was so low..an ealqc.t er The releases air.na condition did not occur.on the Radiation M2nitoring System.
were not detected until the routine shift check of the Radiation ibnitoring System Upon invest.igation it was detennined that Strip Chart Recorders was performed.Un atleases occurred fo11cwing makeup to the m It is postulated that the releases occurred from one of the evaporators tanks.
which were, at the time of the release, shutdswo and va?ved into the redinactive The addition of water to the tanks caused a pressure scr;e which gas vent header.
was subseqtently transmitted to tne shutriemn evaporators which, in ttarn, leded After iso-radioactive gas to the Auxiliary Building Yentilation Exhaust System.
lation of the evaporators frn:n the vent header. no releases cccurred daring st nilu-operations.
Analysis of RM-A3 recsrder charts and local Auxiliary 1}ggiding samplev indicated the radieactive material released was prudemiaantly Xed taneous noble gas release rate that occurred during this period The maxiram in Ess 1.16 x 17gtag/sec., which is below the Technical $cccification lietit of M
The maxicusa averace release rate during this period ssas L2 x 105 33 /ter.
C.72 x 10+2 W/sec. with a total release of 3.965 curies.
P476 2^7 791.0240 %
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MR. J. P. C'Pa111y 2.0 May 27, 1975 An investigation will be conducted to determine the exact location of the gas release point fmm the evaporators.
The necessary corrective action will be taken following the location of the gas release point.
Very truly yours, J. J. Colitz thtt il Superintendent JJC: Jam f
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