ML20011A726
| ML20011A726 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/16/1981 |
| From: | Mason C TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| RO-50-327-81120, NUDOCS 8110290356 | |
| Download: ML20011A726 (1) | |
Text
. _ - _
TE!ECOPY TO MRC October 16, 1981 2
n MS U.S. Nuclear Regulatory t h fselon a
Region II O
2-2" 101 Marietta Street, NW
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>Q Suite 3100 o
Atlanta, Georgia 30303 yy y
ma SQED-50-327/81120 OEi h
ca o'
Reported under Technical Specification 6.9.1.12.h p.:
Date of Occurrence: 10/16/81 Time of Occurrence 1030 (c)
Technical Specification Inv ~ved:
6.9.1.12.h Condi_tions Prior to Occurrence Unit 1 Mode 5 0% Power Unit 2 V. ode 5 0% Power Identification _ _and Description o_f_ Occurr_ence While reevaluating the maximum post accident water level inside containment, the following Class IE electrical components were determined to have a potentially adverse safety impact if they failed because of post accident submergence.
1-PT-68-68, 1&2-TE-68-1/24/60/83, and four (4) lower containment hydrogen ignitors.
W rant Cause of Occurrence The r.aximum post accident water level was inaccurately modeled during initial design.
REGIONAL DIRECTOR DEPUTY D; RECTOR AS9STANT TO.D: RECTOR 0
Other Related E_ vents EC Oh, EC S 9
D! RECTOR, ENF/INV None.
DIRECTOR, ETl PUBLIC AFFAIRS OFFICER Corrective Action taken or Pinnned 1-PT-68-68 is presently being ralocated above the maximum flood level, 162-TE-68-1/24/60/83 have open terminals in the junction boxes which are being spliced and covered with waterpro6f sleeving, and the four (4) hydrogen igniters are being placed on a separate circuit so the remaining igniters will not be effected. These modifications will be completed prior to entry inco Mcde 4.
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2 Power Plant Superintendent
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Sequoyah Nucle.'r Plant
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