ML19317F322
| ML19317F322 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/16/1977 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML19317F319 | List: |
| References | |
| RO-270-77-10, NUDOCS 8001100697 | |
| Download: ML19317F322 (2) | |
Text
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l DUKE POWER COMPANY OCONEE UNIT 2 v
Ryport No.: R0-270/77-10 Report Date_: August 17, 1977 Occurrence Date: August 3, 1977 Oconce Unit 2, Seneca, South Carolina Facility:
Required surveillance not performed on Identification of Occurrence:
Reactor Building purge filter system Unit in cold shutdown with refueling Conditions Prior to Occurrence:
in progress Description of Occurrence:
On August 3, 1977, the performance of'the Reactor Building Purge and Penetration Room Ventilation System Running Time Check procedure deter-I mined that the Unit 2 Reactor Building Purge Filter System had been in service greater.than 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> without being tested as required by j
This filter is used in the spent fuel Technical Specification 4.14.
pool ventilation system to mitigate the consequences of a postulated fuel handling accident. All spent fuel pool handling operations were Tests and analyses required by Technical immediately suspended.
Specification 4.14 were performed with the results meeting the required acceptance criteria. Upon satisfactory completion of these tests spent fuel pool operations were resumed.
Apparent Cause of Occurrence:
A cbnnge to Technical Specification 4.14 in August 1976 established the requirement to test Reactor Building Purge Filters after 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of To ansure compliance, data sheets were initiated to system operation. document whenever filter systems were operated and elapsed runnin A formal procedure to monitor clocks were installed on system fans.
the elapsed running time clocks was not written and approved until August 2, 1977.
The filter tests and analyses were last performed on the Unit 2 Reactor 22, 1977 as required by Technical Speci-Building Purge Filters on June Following the testing, the refueling outage caused the fication 4.14.
A review of Reactor Building Purge system to be in near constant use.
the Equipment RunningTime report shows that the 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> time limit 27, 1977.
was exceeded between July 24 and July The Reactor Building Purge and Penetration Room Ventila~ tion System Running Time check procedure was completed on August 3,1977 and indicated run times of 801 hours0.00927 days <br />0.223 hours <br />0.00132 weeks <br />3.047805e-4 months <br /> for the Purge Fan and 65.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> for the mini-purge fan.
Failure to implement adequate administrative procedures in a timely manner after a change to a Technical Specification is the apparent cause of'this occurrence.
8 001100 h f[
1 L
lt ~ s.e.
e Analypts of' Occurrence:
Five spent fuel assemblics and two orifice rods were moved on July 25th and six spent-fuel assemblies were moved on July 30th. Both movements were contrary to Technical Specification 3.8.12 in that the Reactor
~ Building Purge filter had not been demonstrated operable by the perfor-mance of required testing.. However, a fuel handling accident has been analyzed and the resulting offsite doses would not have exceeded the guidelines of 10CFR100 even if the spent fuel pool ventilation system
, as inoperable. The results of the testing performed on the Reactor w
Building Purge filter indicated that the filter was acceptable for continued use.
Therefore, it is concluded that the health and safety of the public were not endangered.
Corrective Action:
All spent fuel handling operations were suspended immediately after this condition was identified.
In place filter tests were performed on j
August 6, 1977 and a laboratory sample was sent offsite for the methyl iodine removal test. All tests and analyses met the acceptance criteria of Technical Specification 4.14.
The-Reactor Building Purge and_ Penetration Room Ventilation System Running Time Check procedure is being performed on a bi-weekly basis.
Operr'ing personnel have been instructed on the importance of properly comp] ting all reviews and assignments including those of a periodic or-routine nature.
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