ML20149H428

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Corrected SE Re Amends 119 & 117 to Licenses DPR-80 & DPR-82,respectively
ML20149H428
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 07/17/1997
From:
NRC (Affiliation Not Assigned)
To:
Shared Package
ML20149H417 List:
References
NUDOCS 9707240385
Download: ML20149H428 (2)


Text

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l q l TS 4.7.6.1d.1 verifies that the pressure drop across the combined high efficiency particulate air (HEPA) filters and charcoal adsorber banks is less than 3.7 inches water gauge while operating the system at a flow rate of l

73.500 cfm 10 percent.

The surveillance frequency would be extended to REFUELING. INTERVAL.

E TS 4.7.6.1 d.2 verifies that flow is established through the HEPA filters and charcoal adsorber banks on a safety injection (S1) test signal.

The surveillance frequency would be extended to REFUELING INTERVAL.

TS 4.7.6.1d.3) verifies that the heaters dissipate 50 5 KW when tested in accordance with ANSI N510-1980.

The surveillance frequency would be extended to REFUELING INTERVAL.

TS 4.7.6.-1d.4) verifies that leakage through dampers M-2A and M-28 is less than or equal to 5 cfm when subjected to a constant 3ressure or pressure decay leak rate test in accordance with ASME N510-1989.

T1e surveillance frequency would be extended to REFUELING INTERVAL.

3.4.2 Justification for the Chanae The auxiliary building ventilation system (ABVS) for each unit supplies filtered outside air to various locations in the auxiliary building.

The system consists of two redundant sets of supply and exhaust fans, dampers and filter banks.

An electric preheater, and charcoal adsorber bank are also provided when safeguards filtration is required.

The ABVS provides ventilation and cooling to support safety-related equipment, and provides significant reductions in the amounts of airborne radioactive materials that could be released to the atmosphere after an accident.

The licensee requested administrative changes to combine the various intervals arid conditions when carbon testing is required into one surveillance requirement. TS 4.7.6.lc.

Since the licensee recently changed carbon testing methodologies they did not propose a surveillance extension.

The capacity and performance verification of ABVS-is performed using several tests on a 18-month frequency.

Automatic actuation of the safeguards filtration mode is tested every refueling outage with slave relay testing requirements of TS 4.3.2.

Operability of ABVS is verified by other surveillance requirements such as operation of com]onents every 31 days per TS 4.7.6.la.

The automatic damper actuation o) era)ility is verified by testing of the logic of the SSPS on a staggered mont11y frequency.

The licensee stated that a review of the surveillance, maintenance and operating history indicated there are no time-dependent failures and prcblems and that the effect on safety of extending the surveillance interval is small.

The NRC staff finds the proposed changes acceptable.

3.5 Fuel Handlina Buildina Ventilation System l

3.5.1 Proposed TS chanae l

TS 4.9.12b.1. verifies that with a system flow rate of 35.750 cfm i 10 percent and exhausting through the HEPA filters and charcoal adsorbers, the damper L

M-29 is closed.

The surveillance frequency would be extended to REFUELING i

INTERVAL.

9707240385 970717 PDR ADOCK 05000275 P

PDR

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{ intervals and conditions when carbon testing is required into one surveillance requirement. TS 4.9.12c.

Since the licensee recently changed carbon testing i

methodologies they did not propose a surveillance extension. The capacity and L

performance verification of the FHB ventilation system is performed using several tests on a 18-month frequency. Automatic actuation.of the safeguards filtration mode is tested quarterly to meet TS 4.3.3.1 radiation monitor l

channel functional testing requirements.

This test also means that the startup of one of the safety-related exhaust fans with a safeguards filter train automatic shutdown of the normal exhaust fan and closure of the associated inlet damper is tested quarterly.

Operability of the FHB ventilation system is verified by other surveillance requirements such as o)eration of components every 31 days per TS 4.9.12a.

The licensee stated tlat a review of the surveillance, maintenance and operating history indicated there are no recurring failures and problems and that the effect on safety of j

extending the surveillance interval is small.

The NRC staff finds the proposed changes acceptable.

4.0 STATE CONSULTATION

In accordance with the Commission's regulations, the California State official was notified of the proposed issuance of the amendments.

The State official had no comments.

5.0 ENVIRONMENTAL CONSIDERATION

i These amendments change surveillance requirements.

The NRC staff has determined that the amendments involve no significant increase in the amounts.

and no significant change in the types. of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure.

The Commission has previously issued a proposed finding that the amendments involve no significant hazards consideration, and there has been no public comment on such finding (61 FR 52966). Accordingly, the amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).

Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.

6.0 CONCLUSIr l

The Commissio: nas concluded, based on the considerations discussed above.

that (1) there is reasonable assurance that the health and safety of the l

public will not be endangered by operation in the proposed manner. (2) such activities will be conducted in compliance with the Commission's regulations, l

and (3) the issuance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.

Principal Contributors: S.V. Athavale S. Bloom l

T. Dunning l

Date: April 14,1997

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