ML20128B246

Proposed TS 3.15 Re Event Monitoring Instrumentation

ML20128B246
Person / Time
Site:	Prairie Island
Issue date:	01/29/1993
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML20128B236	List: ML20128B232 ML20128B239 ML20128B246
References
NUDOCS 9302020447
Download: ML20128B246 (6)

Text

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9 Exhibit B Prairie Island Nuclear Generating Plant License Amendment Request Dated January 29,*1993 Proposed Changes Marked Up _

on Existing Technical Specification Pages ,

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Exhibit B consists of existing Technical Specification pages with the proposed changes highlighted on_those pages. The existing pages-'affected by this t License Amendment Request are listed below:' 3 TS.3.15 1 B.3.15 1 b

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9302020447 930129

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TS.3.15 1 REV-91--40A449 3.15 EVENT HONITORING INSTRUMENTATION 6pollenbility Applies to plant instrumentation which does not perform a protective func-tion, but which provides information to monitor and assess important parameters during and following an accident.

Obiective To ensure that sufficient information is availabin to operators to deter-mine ti,e offects of and detertaine the course of an accident to the extent required to carry out required manuni actions.

SReei fica.Lir.D A. Process Monitors

1. The event monitoring instrumentation channelc apecified in Table TS.3.15 1 shall be OPERABLE.

2. With the number of OPERABLE event monitoring instrumentation channels, yxceptTthe core l exit:th6rmocpuples? less than the Required Total Number of Channels shown on Table TS.3.15 1, either restore the inoperable channels to OPERABLE status within 7 days, or be in at Icast HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

R WithT the nbah e r Fo f? OPERABLE ch annel s ? foF i.h n' c o re "ex i t; the rm6c ouple s less than the; RequiredL. Total Number ;of Channelo1 shown on; Table, TS.3.15 1, but'with greater than or: equal; to:4l core exit

.thermocouples OPERABLE.inlthejcenterLcore region;.and greatsrithanlor equal.to 4.. core exit;thermocouplesf0PERABLE in the outsideicore region,frestoretthe; inoperable channelsrto;0PERABLEystatbs within3 0 days,;1or preparo: and submit a Special' Report to thn' Connaissioti put;suant to ' Technical Specification 617;BMi' thin: theinext- 14 da' i outliningthe: action (taken,!thncausetofthe;inoperabilityfandlthe

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plansland;schedu1lelfordrestoring'ith.e systemLto n JPERABLE status) 4.j Vith thel number Tof(OPERABLE 1'chhnnoisf for3hb f corif exit}the rmocoUples less than the Required Totali Numberi of:Channela' shownfonLTable -

TS.3.15al',,and with'lesa'than 4: core (exitithermocouples; OPERABLE [i'it either the cehter-or-outside; core l region,Lrestore)the inoperable phannels' to OPERABLE statuslwithinidays..;oribelinfati lcastiHOT SHUTDOWN;withsnl:th.e nnxtL 76 b.ours.

5. With the number of OPERABLE event monitoring instrumentation channels less than the Minimum Channels Operable requirements of Table TS.3.15-1, either restore the minimum number of channels to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

l B.3.15 1 RE" 91 10/37/40 3.15 EVENT HONITORING INSTRUMENTATION Bases The OPERABILITY of the event monitoring instrumentation ensures that sufficient information is available on selected plant parameters to monitor and assess these variables during and following an accident.

Tnis capability is consistent with the recommendations of NUREG-0578 and NUREG 0737.

The folloWing: core exit ~thermocouples'are'thcludad'In'the~ce'nter cord region rpferenced in Specification 3.15.A.3. If a ther90 couple in not listed;below,Jit..is_ located irtthe outside; core region. c Thermocouple Core

': Number locatimIl 5 C-6 6 C8 9 D5 10 D7 12 E-4 13 E6 14 E 10 26 F- 7, 18 G-4 19 06 22 11 5 23 11 - 9 25 11 _1 1 28 1-4 29 1;6 30 1 10 32 J-6 33 JJ8 34, J.9 Core exit thermocouple readings necessary to meet the requirements of Specification 3.15.A are available from the Plant Process Computer, the Control Room Core Exit Thermocouple Display or if no other readout is availablo, from test equipment readings from the Core Exit Thermocouple Junction Boxes.

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Exhibit C Prairie Island Nuclear Generating Plant License Amendment Request Dated January 29, 1993 Revise 6 Technical Specification Pages Exhibit C consists of revised pages for the Prairie Island Nucicar Generating Plant Technical Specification with the proposed changes incorporated. The revised pages are listed below:

TS.3.15 1 B,3.15 1

TS.3.15-1 3.15 EVENT HONITORING INSTRUMENTATION Aeolicability Applies to plant instrumentation which does not perform a protective func-tion, but which provides information to monitor and assess important parameters during and following an accident.

Objective To ensure that sufficient information is available to operators to deter-mine the effects of and determine the course of an accident to the extent required to carry out required manual actions.

Specification A. Process Monitorg

1. The event monitoring instrumentation channels specified in Table TS.3.15 1 shall be OPERABLE.

2. With the number of OPERABLE event monitoring instrumentation channels, except the core exit thermocouples, less than the Required l Total Number of Channels shown on Table TS.3.15-1, either restore the inoperable channels to OPERABLE status within 7 days, or be in at least HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

3. With the number of OPERABLE channels for the core exit thermocouples less than the Required Total Number of Channels shown on Table TS.3.15-1, but with greater than or equal to 4 core exit thermocouples OPERABLE in the center core region and greater than or equal to 4 core exit thermocouples OPERABLE in the outside core region, restore the inoperable channels to OPERABLE status within 30 days, or prepare and submit a Special Report to the Commission pursuant to Technical Specification 6.7.B.2 within the ney.t 14 days outlining the action taken, the cause of the inoperability, and the plans and schedule for restoring the system to OPERABLE status.

4. With the number of OPERABLE channels for the core exit thermocouples less than the Required Total Number of Channels shown on Table TS.3.15 1, and with less than 4 core exit thermocouples OPERABLE in either the center or outside core region, restore the inoperable channels to OPERABLE status within 7 days, or be in at least HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

5. With the number of OPERABLE event monitoring instrumentation channels less than the Minimum Channels Operable requirements of Table TS.3.15 1, either restore the minimum number of channels to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least HOT SHUTDOWN within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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e B.3.15 1-  !

3.15 EYENT MONITORING INSTRUMENTATION Bases  ;

The OPERABILITY of the event monitoring instrumentation ensures that sufficient information is available on selected plant parameters-to j monitor and assess these variables during and following an' accident. i This capability is consistent with the recommendations of NUREG 0578 L and NUREG 0737.

The following core exit'thermocouples are included in the center core region referenced in Specification 3.15.A 3. If a thermocouple is not '

listed below, it is located in the outside core region.

Thermocouple Core Number Location ,

5 C 6- ,

6 C-8 9 D-5 i 10 D-7  ;

12 E4 13 E6 14 E-10 16 F7 18 G4 19 G6 22 H5 23 11 9 25 11 11 28 1-4 29 18 30 1-10 32 J6 33 J8 34 J9 Core exit thermocouple readings necessary to meet the requirements of.

Specification 3.15.A are available from the Plant Process Computer, the Control Room Core Exit Thermocouple Display or if no other readout is-

-available, from test equipment readings from the Core Exit Thermocouple Junction Boxes.

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