ML17212B534
| ML17212B534 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 04/12/1982 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17212B533 | List: |
| References | |
| NUDOCS 8204220515 | |
| Download: ML17212B534 (3) | |
Text
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UNITED STATES NUCL REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION
'SUPPORTING AMENDMENT NO.
49 TO FACILITY OPERATING LICENSE NO.
DPR-67 FLORIDA POWER 5 LIGHT COMPANY ST.
LUCIE PLANT, UNIT NO.
1
'OCKET NO. 50-335 4
==
Introduction:==
On May 23, 1978 we issued Amendment No.
26 to Facility Operating License No.
DPR-.67 for St. Lucie Unit 1.
That amendment revised the Technical Specifications to reflect installation of a NaOH containment spray additive system.
That amendment also added condition 9 to the license which required that Florida Power and Light Company (FPL or the licensee) propose.a Technical Specification change related to periodic flow path verification of that system.
~ By letter dated February 9, 1979 (L-79-37) as supplemented on January 19, 1981 (L-81-20),
FPL proposed such a change and satisfied the license condition.
We have evaluated the proposed testing require-ment.
For a different issue, FPL, by letter dated February 21, 1979 (L-79-44) proposed a Technical Specification change to correct an inconsistency with regard to instt.'ument air system containment isolation valve closure time..
requirements.
We have also evaluated that proposed change.
Evaluation:
A.
NaOH Flow Path Ijterification FPL s proposed addition of Technical Specification 4.6.2.2.d requires flow path verification tests on a once per five year basis using a two step method.
The first step will verify flow from the NaOH tank to a test cennection downstream of the tank outlet.
The second step will, using demineralized
- water, check the flow path from the test cohnection to th' containment spray pumps.
To ensure that flow path degradation can be determined from the results of this test, we require that flow rates (with tolerances)"be specified.
- However, performance of the base-line (initial) test using the method described above is not scheduled until the 1983 refuelipg outage.
There-fore, the flow rates and tolerances have not been provi'ded as part of the proposed change.
82042205}5 8204l2I PDR ADOCK 05000335','
Since these values will be used to evaluate testing done subsequent to the base-line test, it is not necessary that they be.specified at this time.
To ensure that they are.added to the Technical Specifications, FPL has agreed to propose a cliange to this.specification, which provides the appropriate values of flow rates and tolerances, within 6 months of restart. from the 1983 refueling outage.
The proposed change to the St. Lucie Unit 1 Technical Specifications provides
. additional. assur'ance that the NaOH spray additive system will function proper ly and is acceptable.
FPL's proposed.change'also satisfies the requirements of license condition 9 which may be deleted..
B.
Instrument Air S stem Valve Closure Times By.letter dated February 21,
- 1979, FPL requested a change to the Techni-cal Specifications.
The purpose of the request is to correct an inconsist-ency between.the requirements of Technical Specifications 3.3.2.1 ahd 3.6.3.1.
Both specifications deal with the valve closure time of a contain-ment 'isolation valve (I-NV-18-1) provided for the instrument air penetration.
Specification 3.3.2.1 establishes the Engineered Safety Feature Actuation System (ESFAS) instrumentation channel respo'nse times required for the ESFAS to be declared operable.
For the containment isolation function; per Table 3.3.5, the required response time is
< 20.5 seconds.
Table 3.6'.2 of Specification 3.6.3.1, containment isolation. valve OPERABILITY requirements, lists an isolation time. of 28 seconds for. the above cited valve.
The licensee proposed that a footnote be added to Table 3.3.5 to exclude val.ve I-NV-18-1 from this requirement.
This would have the effect of specifying.one response time for this valve; 28 seconds.
Valve I-NV-18-1, a normally closed valve located outside the containment, is listed on Table 6.2-16 of the FSAR as one of three valves providing containment isolation of the instrument ai.r system,'he other two contain-ment isolation valves are check valves (I-V-18-857),.with one located inside and the'ther outside of containment.
Since valve I-NV-18-1 provides an'dditional level of redundant isolation for this penetration, we conclude that the response time of 28 seconds, consistent with the valves OPERABILITY requirement, is the value which should be required by Technical Specifications.
We, therefore, conclude that the proposed change to modify.table 3.3-5 of Specification 3.3.2.1, to delete valve I-NV-18-1 from the response time
~ requirement, is acceptable..
Environmental Consideration-We have determined that the amendment does not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact.
Having made this determination, we have further concluded that the amendme'nt involves'n. action which is insignificant from the standpoint of environmental impact and, pursuant to,lO. CFR 551.5(d)(4), that an environmental
'-impact statement-or negative declaration and environ-mental impact appraisal need not 'be prepared in connection with the
'ssuance of this amendment.
Conclusion
. Me have concluded, based on the considerations discussed above, that:
(1) because the amendment does not involve a significant increase in the probabili.ty or consequences.
of accidents previously considered and does not involve a significant decrease in a safety margin, the amendment does not involve a significant 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 regulations and the issuance of %his amendment will not be inimical to the common defense and security or to the health and safety of the public.
Date:
April 12, 5982 Principal Contributors:
Chris Nelson Dave Shum