ML19318B879
| ML19318B879 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/12/1980 |
| From: | Cross J TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-06, IEB-80-6, NUDOCS 8006300228 | |
| Download: ML19318B879 (3) | |
Text
_ _. _
lD TENNES2EE VALLEY AUTHORITY
"& BG9 CHATTANOOGA, TENNESSEE 37401 g g>
500A Chestnut Street Tower II
- JUU U E.
- .i JUN 121980 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U.S. Nuc1 car Regulatory Commission Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
OFFICE OF INSPECTION AND ENFORCEMENT BULLETIN 80 RII:JP0 50-259, -260, -296 - BROWNS FERRY NUCLEAR PLANT In response to your March 13, 1980, letter which transmitted OIE Bulletin 80-06, enclosed are the results of our investigations to date for the Browns Ferry Nuclear Plant. As discussed with Hugh Dance of your staff in a May 7, 1980, telephone conversation, TVA will provide monthly updates on the status of our review beginning July 10, 1980. TVA anticipates completion of the review for this bulletin on or before November 1, 1980. If you have any questions, please call Jim Domer at FIS 857-2014.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. L. Cross Executive Assistant to the Manager of Power Subscribed.and, sworn to{/W980 before me this
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Enclosure cc: Office of Inspection and Enforcement (Enclosure)
U.S. Nuclear Regulatory Commission Division of Reactor Operations Inspection Washington, DC 20555 OFFICIAL COUb
/ 2[An Equal Opportunity Employer
ENCLOSURE BROWNS FERRY NUCLEAR PLANT (DOCKET NOS. 50-259, -260, -296)
RESPONSE TO NRC-OIE BULLETIN 80-06 As discussed with Hugh Dance of your starf in a May 7, 1980, telephone conversation, TVA cannot provide all of the information requested by OIE Bulletin 80-06 at this time. The reason for not being able to fully comply with your request is due to the large number of NRC-0IE Bulletins currently being investigated by TVA and because some testing may require unloading fuel to perform the test.
In the May 7, 1980, telephone conversation, TVA committed to provide monthly updates of the progress of our investigations and review.
Results of Investigations As of June 11, 1980 The following actuation signals have been identified to be considered in the investigation for Browns Ferry:
1.
Reactor vessel low water level 2.
Reactor vessel low-line water level 3.
High Radiation - main steam line 4.
Line break - main steam line (steam line high space temperature on high steam flow) 5.
High pressure between ruptured discs on turbine exhaust 6.
High drywell pressure 7.
Line break in cleanup system high floor drain temperature or high space temperature; alarm and close cleanup system isolation valves 8.
Line break in RCIC system steam line to turbine (high steam line space temperature high steam flow, or low steam line pressure) 9.
Line break in HPCI system steam line to turbine (high steam line space temperature, high steam flow, or low steam line pressure) 10.
Low main steam line pressure at inlet to turbine (RUN mode only) 11.
High radiatiot, refueling zone 12.
High radiation, reactor building ventilation exhaust The following systems will be reviewed to determined if a test is needed:
a.
Primary Containment system b.
RHR system d.
Core spray system e.
HPCI f.
RCIC g.
Auto blowdown S.
Standby gas treatment j.
Standby diesels k.
Miscellaneous systems m--
.. _ y f
- s
~2-We plan to provide you with additional information regarding any needed proposed system modifications, design changes, or other corrective actions planned and the schedule for completion of the changes, if any are necessary. This information will be provided in the monthly progress reports.
It is our understanding that Hugh Dance of your staff indicated this approach for providing the information requested in OIE Bulletin 80-06 would be acceptable.
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