ML19262A266
| ML19262A266 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/26/1975 |
| From: | Herbein J METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19262A260 | List: |
| References | |
| NUDOCS 7910260599 | |
| Download: ML19262A266 (2) | |
Text
.-
/
.y-Q./ '& K' '
I
,i.-,....,
- r..
- i s
IE.TROPOLITAN EDISON CC?S.NY m:, canon.. tr. /
St' c ' w ' 7 ',5 7 TELEPHONE 717 944 4041 Fabruary 25, 1975 3.'7-7 Mr. J.P. O'Reilly, Director Directorate of Regulatory Region I 531 Park Avenue King of Prussia, Pa.
19405 Operating License CPR-50 Docket 50-239
Subject:
Unplanned release of radioactive material at TMI through the plant vent from the Auxiliary Building.
Dear Mr. O'Reilly:
This telegra.a is to confirm the conversation bet. een Lee Spessard (Region I-NRC),
and J.G. Herbeia (TMI-Station Superinter. dant) at 0903 hours0.0105 days <br />0.251 hours <br />0.00149 weeks <br />3.435915e-4 months <br /> 25 February 1975.
On February 24, 1975 bet.leen 202a and 2250 an inadvertant re' lease of radioactive material occurred over a period of appr;ximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and 26 minutes.
The inadvertant radioactive material release occurred due to a build up of rad-ioactive gas in the Auxiliary Euilding following a loss of ventillation in the building.
The loss of Auxiliary Building ventillatica uas due to an inadvertant activation of the air intake tunnel deluge fire protection system.
The fire system actuation was-subsequently traced to a faulty temperature sensor in the air intake tunnel.
The air intake tunnel deluge fire protaction system was returned to normal system line up.
The Auxiliary Building ventillation fans were started, and.
the radioactive gas which had accurulated was drawn frc, the Auxiliary Building into the plant vent and subsequently discharged to the atr.osphere.
Analysis of the. radiation effluer.t ronitar (RF.A-8) recorder charts and local Auxiliary Buildiog samples indicated the cadioactive raterial released was predominately Xela3 was 5.54 x 103 n3 sec(983), and that the instantaneous.0ble gas release rate
/
., which is belcw the technical specification limit of 5 m3 sec.
The average release rite over tne 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and 26 minute 1.2 x 10
/
period of this release was 2.07 x 103 r.3 se:..:ith a total release of ncble
/
gas of 5.37 curies.
q 4g4 ]g7
$9102608
%3 c a
Feb. u ?.ry 25, 1975 The cause or source of the 1.e 33 gas a:cuTulation in the Auxiliary Suildir.;,
1 during the pericd the vent f ar.s.;ere r.:
operating, *is presently unknr. r.
A. detailed air sam? ling prograr.,.ihich..ill be accomplished with At xiliary Building ventillation f ans shuc off,.:ill be develooed and completed in an effort to deter.7.ine the source and cause of the Xel,' 3, gas build up in the 3
Auxiliary Building.
.0
/ /
I. *./
\\.
v...
- g) i
/
J.G. Herbein Station Superintendent JGH/d.m 9
- 1 e
S i
e G
e 1484 268
~