ML17238A739
| ML17238A739 | |
| Person / Time | |
|---|---|
| Site: | Dresden  (DPR-025) |
| Issue date: | 04/05/1972 |
| From: | Worden W Commonwealth Edison Co |
| To: | Morris P US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17238A739 (1) | |
Text
.Regu**
- latory
',I -
"~
- Commonwealth Edison 0 NE FIRST NAT I 0 NA L PLAZA
- CH IC AG 0, ILL I N 0 IS Address Reply to, POST OFFICE BOX 767 *CHICAGO, ILLINOIS 60690 Dresden Nuclear Power Station R *. R. Ill Dr. Peter A. Morris, Director Division of Reactor Licensing
- u.
- S. AEC Washington, D.C.
20545 Morris, Illinois 60450 April 5, 1972
Subject:
License DPR-25 DNPS U#3 Section 6.6.C.l of the Technical Specifications
==Dear Dr
- Morr is :==
This is to report a condition relating to the operation of the station, in which it was found that the secondary containment requirements specified in section 3.7.C.l of the Technical Spedifications were not in effect.
- PROBLEM AND INVESTIGATION On March 27, 1972 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, with Unit #2 in the refuel mode and Unit #3 in the run mode operating at 800 MWe, it was discovered that both railroad doors on the Unit 2/3 air lock were opened.
Inunediate action was taken, and the doors were closed by 1310.
Investigation revealed that the outer doors were verified closed at :l'iliOOsso thetcontainment requirements were not violated for a period of much more than two.hours.
The identity of personnel ~esponsible for opening *~he doors c,ould not be.determined.
CORRECTIVE ACTION To prevent a similar incid~nt in the future, both inner and outer doors have been and will remain locked except during authorized use, and an operating procedure will be issued detailing the operating of these doors.
WPW:sds Sincerely,
\\,\\).~.~
- w. P. Worden Superintendent DOCKETID USAEG APR lo 1972 t>
REGULATORY I ~
OMAIL SECTION D VJ OCKtr Cl.ERK