ML20113H452

Proposed TS 3.7-2 & 4.6-2 Re Auxiliary Electrical Sys & Cooling Water Sys,Respectively

ML20113H452
Person / Time
Site:	Prairie Island
Issue date:	07/23/1992
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20113H451	List: ML20113H449 ML20113H452
References
NUDOCS 9208030013
Download: ML20113H452 (3)

Text

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4 Exhibit A I Prairio Island Nuclear Generating Plant i

Suppleu.cnt to License Amendment Request Dated March 20, 1992 Revised Technical Specifications Pages Exhibit C consists of revised pages for the Prairic Island Nuclear Generating Plant Technical Specifications with the proposed changes incorporated. The revised pages are listed below:

TS.3.7-2 TS,4.6 2 l

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TS.3J/-2 .

f3.7[B. -During STARTUP OPERATION'or' POWER OPELATION, any of thenfollowing-conditions of inor crbility may exist for the. times specified, ~l provided STARTUP Otr.KATION is discontinued until OPERABILITY is  ;

restored _ If' OPERABILITY is not' restored within the time. specified,

.i place the ~affected unit (s) in at least 110T SilUTDOWN within the next 6  !

. hours and be'in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

1. Onediesel-generatormaybeinoperablefor7daysprovided(a)the-l OPERABILITY of the other dieaal generator is demonstrated

• by performance of surveillance requirement 4'.6. A.1.e within. 24 1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> **, (b) all engineered safety features' equipment associated

- with the operablo-diesel generator is OPERABLE, (c) the two re. quired' paths from~ the grid to the unit 4 kV safeguards - l distribution system are OPERABLE.and (d) the OPERABILITY of.the-two_ required paths:from the grid-shall be verified OPERABLE within 1 -hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereaf ter.

2s One of the two required paths from the grid to-the unit 4 kV l safegucrds.-distribution system may be inoperahlo for 7 days provided (a) D1 and D2L(Unit 2: DS and D6).dfesel generators are l

_ < -already operating or are demonstrated to be OPERABLE by sequentially performing surveillance requirement 4.6. A.l.e on each diesel generator within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and (b) the OPERABLE path from l

the grid:shall be verified OPEPABLE within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and~at least once per'8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.

3. One of the:two required paths from the grid to the unit 4'kV l-1 safeguards distribution system and one diesel' generator may be inoperable for.12-hours provided, (a) the OPERABILITY of the other

-diesel generator.is-demonstrated

• by performance'of Surveillance Require' ment 4.6.A.1.e within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> **, (b) allLengineered- safety features equipment associated =with the OPERABLE dieset-generator is OPERABLE, ~ and (c) the OPERABLE path from the ' grid shall be verified OPERABLE within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> t_herea f te r.

- 4 '. = Both ofs theltvo required paths from the grid to the unit 4 kV-. l-safeguards distribution system may be inoperable for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> J provided the-D1 and D2 (Unit 2: D5 and D6) diesel generators are l

already operating or:are demonstrated to be OPERABLE by sequentially performing Surveillance requLrement 4.6. A.1.e on each diesel generator within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

• J - The OPERABILITY of. the other diesel generator need not be demonstrated if i

' the diesel. generator inoperability was due to preplanned preventative maintenance or: testing.

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• • This test is required to be completed regardless of when the inoperable diesel; generator is restored'to OPERABILITY.

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TS.4.6 2 i.'

4.6.A.2. At least once each 6 months, for each diesel generator:

a. Verify the diesel generator starts and accelerates to at least synchronous speed in less than or equal to 10 se.conds. l

b. Verify the generator voltage and frequency to be 4160 t 420 volts and 60 i 1.2 Hz within 10 seconds after the start signal.

c. Manually synchronize the generator, load to at least 1650 kW (Unit 2: 5100 kW to 5300 kW) in less than or equal to 60 seconds and operate for at least one hour,

d. This test should be conducted in accordance with the _

manufacturer's recoremendations regarding engine prelube and shutdown procedures where possible.

3. At least once each 18 months:

a. Subject each diesel generat.or to a thorough inspection in accordance with procedures prepared in conjunction with the manufacturer's rtcommendations for this class of standby service,

b. For each unit, simulate a lose of of fsite power in conjunction witii a safety injection signal, and:

1. Verify de energization of the emergency bur.es and load shedcing from the emergency buses.

2. Verify the diesels start on the auto start signal and energize thc emergency buses in one min te. This test should be conducted in accordance with the reanuf acturer's recommendations l 7 regarding engine prelube and shutdown procedures where -

possible.

3. Verify that the auto-connected loads do not exceed 3000 kv (Unit 2: 5100 kW). l

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4. Verify that the diesel generator system trips, except those for engine overspeed, greund fault, and generator differential current, are automatically bypassed. ,

c. Demonstrate full-load carrying capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> are at a load equal to 105 to 110 percent of the continuous rating of the emergency diesel (

generator, and 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> are at a load equal to 90 to 100 percent of its continuous rating. Verify the generator voltage and frequency to be 4160 1 420 volts and 60 t 1.2 Hz.

d. Verify the espability of each generator to reject a load of at j least 650 kw (Unit 2: 860 kw) without tripping. l

e. During this test, operation of the emergency lighting system shall be ar.certained.

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