ML20063K092

Proposed Tech Specs Pages 3.7-1 & 3.7-3 Re Auxiliary Electrical Sys Changes

ML20063K092
Person / Time
Site:	Prairie Island
Issue date:	02/14/1994
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20063K091	List: ML20063K090 ML20063K092 ML20064K254
References
NUDOCS 9402280196
Download: ML20063K092 (3)

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Exhibit C  :

Prairie Island Nuclear Generating Plant License Amendment Request Dated February 14, 1994 Revised Technical Specifications Pages Exhibit C consists of revised pages for the Prairie Island Nuclear Generating Plant Technical Specifications with the proposed changes incorporated. The-revised pages are listed belows s

TS.3.7-1 ,

TS.3.7-3 $

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9402290196 940214 PDR ADOCK 05000282 p PDR ~

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< 'I TS.3.7-1 i 3.7 AUXILIARY ELECTRICAL SYSTEMS Applicability Applies to the availability of electrical power for the. operation of plant auxiliaries. .

Obiectives <

t To define those conditions of electrical power availability necessary to assure safe reactor operation and continuing availability of engineered safeguards.

Specification A. A reactor shall not be made or maintained critical nor shall reactor coolant system average temperature exceed 200*F unless all of the following requirements are satisfied for the applicable unit (except as specified in 3.7.B below):  :

.1. At least two separate paths from the transmission grid to the unit 4 kV safeguards distribution system each capable of providing adequate power ,

to minimum safety related equipment, shall be OPERABLE.

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2. The 4 kV safeguards buses 15 and 16 (Unit 2 buses: 25 and 26) shall be 4 energized.

3. The 480 V safeguards. buses lil, 112, 121, and 122 (Unit 2 buses: 211, l 212, 221 and'222), and their safeguards motor control centers shall be energized.  ;

4. Reactor-protection 1.nstrument AC buses shall be energizeo: 111,.112, i 113 and 114 (Unit 2 buses: 211., 212, 213 and 214).

5. The following unit specific conditions apply i

(a) Unit 1: D1 and D2 diesel generators are OPERABLE, and a fuel l supply of 51,000 gallons is available for the D1 and D2' diesel 4 generators in the Unit 1 interconnected diesel fuel oil storage ~,

tanks. A total fuel supply of 70,000' gallons is available for the '

D1 and D2 diesel generators and the diesel-driven cooling water.

pumps in the Unit 1 interconnected diesel fuel oil storage tanks.

(b) Unit 2: DS and D6 diesel generators are. OPERABLE and a fuel supply of 75,000 gallons is available for DS and D6. diesel generators in the-Unit 2 interconnected diesel fuel oil storage tanks.

6. Both batteries with their associated chargers and both d-c safeguard systems shall be OPERABLE.

7. No more than one of the Instrument AC Panels ill, 112, 113 and 114 (Unit 2 panels: 211, 212, 213 and 214) shall be powered from Panel 117 (Unit 2' panel 217) or its associated instrument inverter bypass source.

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TS.3.7-3

. i 3.7.B.S. D1 and D2 (Unit 2: DS and D6) diesel generators may be inoperable for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> provided the two required paths from the grid to the unit'4 kV safeguards distribution system are OPERABLE and the OPERABILITY of the two required paths from the grid are verified OPERABLE within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

6. One 4 kV safeguards bus (and/or its associated 480.V buses including associated safeguards motor control centers) may be inoperable or not  ;

fully energized for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided the redundant 4 kV safeguards bus and its associated 480 V safeguards buses are verified OPERABLE l and the diesel generator and safeguards equipment associated with the redundant train are OPERABLE.

7. One battery charger may be inoperable for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided, (a) its ,

accociated battery is OPERABLE, (b) Its redundant counterpart'is verified OPERABLE, and (c) the diesel generator and 3afeguards equipment associated with its counterpart are OPERABLE.

8. One battery may be inoperable for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> provided that the other .I battery and both battery chargers remain OPERABLE. f

9. In addition to the requirements of Specification TS.3.7.A.7 a second inverter supplying Instrument AC Panels 111, 112, 113, and 114 may (Unit 2 panels 211, 212, 213 and 214) be powered from an inverter ,

bypass source for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, f

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