ML20063H646
| ML20063H646 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/17/1982 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20063H635 | List: |
| References | |
| NUDOCS 8209020050 | |
| Download: ML20063H646 (2) | |
Text
SAFETY EVALUATION HY THE OFFICE OF NUCLEAR REACTOR REGULATION, RELATED TO AMEN 0HENT NO. 15 TO FACILITY OPERATING LICENSE DPR ~17, AND AMEN 0 MENT NO. 6 TO FACILITY OPERATING LICENSE DPR-79 TENNESSEE VALLEY AUTHORITY INTRODUCTION On July 30, 1982, TVA informed the NRC that the pressurizer relief tank water level indication in the auxiliary control room for Unit 2 was inoperative.
The technical specifications require that an inoperable instrment must be restored within seven days or be in a hot shutdown within the next twelve hours.
It was determined that the level transmitter failed and to make repairs or replace the instrunent requires entrance into the lower part of the containment which cannot be nade with the reactor at power.
EVALUATION The auxiliary control room is designed for emergency shutdown of the plant from outside the main control room in the unlikely event the main control room requires evacuation. Tables 3.3-6 and 4.3-6 of the technical specifications identify the instrumentation in the auxiliary control room and their surveillance requirements.
The staff agrees that item 12, Pressurizer Relief Tank Level, need not be in these tables of instrumentation for shutdown and surveillance requirements. The basis for this conclusion is that in the emergency operating instructions for shutdown outside the control room no operator reliance, action, or decision is based on the pressurizer relief tank level. Also, there are no technical specification require-ments for tank level requirements in the main control room. Also Westinghouse Standard Technical Specifications do not identify this instrument as necessary.
Discussions with the applicant indicate that this iten was included in the tech-nical specification tables simply because it was one of the instrments in the auxiliary control room. Pressurizer relief tank water level is regarded as a useful piece of infonaation, but not essential to the safe shutdown of the plant.
This instrument will be put back in operation at the next extended forced outage l
of Unit 2.
The instrument in Unit 1 is still operational.
8209020050 020817 PDR ADOCK 05000327 P
PDR OFF4CE >
suauwd oan >
OFFIClAL RECORD COPY usce mi-mm l NRc FORM 318 (10-80) NRCM 02o
r o
(
-3 ENVIRONMENTAL C0flS10 ERAT 10tt We have deternined that the anendment does not authorize a change in effluent types or total a,ounts nor an increase in power level and will not result in any signif-icant environmental impact.
iiaving made this determination, we have further con-cluded that the amendment involves an action which is insignificant fral the stand-point of environnental impact and, pursuant to 10 CFR 5ection Sl.S(d)(4), that an environnental impact statement or negative declaration and environnental impact appraisal need not be prepared in connection with the issuance of this anendment.
C0f4CLUSI0ft we have concluded, based on the consideration discussed above, that: (1)because the amendnent does not involve a significant increase in the probability or con-sequences of accidents previously considered, does not create the possibility of an accident of a type different from any evaluated previously, and does not involve a significant decrease in a safety roargin, the amendment does not involve a signi-ficant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with the Commission's regu-lations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Date: August 17, 1982 Principal Contributors: Frank Orr, Reactor Systens Branch, DSI lurtin Virgilio, Instrumentation and Control Systens Branch, DSI Carl Stahle, Licensing Branch No. 4, DL l
l oenerp SURNAME)
Dr TE )
nne ronu ats om mcu em OFFICIAL RECORD COPY u m.i9ei-m e