ML20012B686

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Proposed Tech Spec,Eliminating Requirement to Shutdown If One of Four Pressurizer Level post-accident Monitoring Channels Inoperable
ML20012B686
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 03/07/1990
From:
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20012B682 List:
References
NUDOCS 9003160107
Download: ML20012B686 (6)
v • d • e


Text

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ATTACHMENT 1.

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ST HL.AE-PAGE..2 - 0F 3') 9 4 b flNSTRUMENTATION gj[ ' , ,

ACCIDENT MONITORING INSTRUMENTATION-

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g LIMITING CONDITION FOR' OPERATION l E

'3.3.3.6.;The accident monitoring instrumentation channels shown in Table 3.3-10'  !

shall be,0PERABLE- '

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, APPL 1CABillTY: MODES 1, 2, and-3.

ACTION: 'j -

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.a. As shown in Table 3.3-10. j n . .

[ ;bi ;The provisions of Specification 3.0.4 are not applicable, j

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i. . SURVEILLANCE REOUIREMENTS  ;

L' . ~i L 4.3.3;6~ Each accident monitoring instrumentation channel- shall be demonstrated .

' OPERABLE by performance of the CHANNEL CHECK and CHANNEL CAllBRATION at the l frequencies ~shown in Table 4.3-7.

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, SOUTH TEXA5 -' UNITS 1 & 2 3/4 3-67 .

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, TABLE 3.3-10 8 -

g ACCIDENT MONITORING INSTRUMENTATION .

h TOTAL NO. OF HINIMUM ^

3 CHANNELS CilANNELS OPERABLE- ' ACTION

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INSTRUMENT

$ 1. Containment Pressure 4 1 38 C

_ 2. Reactor Coolant Outlet Temperature -

g THOT (Wide Range) 1/ loop 1/ loop 35 m

3. Reactor Coolant In W Temperature -

-CdLD (Wide Range) 1/ loop 1/ loop 35

4. Reactor Coolant Pressure - Wide Range 3 1 37 m and Extended Range 2 43
5. Pressurizer Water Level 4 1 g m

m 6. Steam Line Pressure 4/ steam generator 1/ steam generator 38

7. Steam Generator Water Level -

Narrow Range. '/ steam generator

< 1/ steam generator 38

8. Steam Generator Water Level -

Wide Range 1/ steam generator 1/ steam generator 35

9. Refueling Water' Storage Tank Water Level 3 1 37 me DM
10. Auxiliary Feedwater Storage TarA mg Water Level 3 1 37 p g' m
11. Auxiliary Feedwater Flow 1/ steam generator 1/ steam generator 35 y$
12. Reactor Coolant System Subcooling Margin Monitor 2 1 36 y e .

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,,,. TABLE 3.3-10 (Continued) g ~

I ACCIDENT MONITORING INSTRUMENTATION ,

-e R TOTAL MINIMUM

$; NO. OF- CHANNELS .

, . INSTRUMENT . CilANNELS OPERABLE ACTION C

5. 13. Containment Water Level

,7 (Narrow Range) 2 1 36

c. 14. Containment Water tevel (Wide Range) J 1 3/

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    • 4 thermocouples/ core 42
15. Core Exit Thermocouples quadrant
16. Steam Line Radiation Monitor 1/ steam line 1/ steam line 40 5 17. Containment - High Range Radiation w Monitor 2 1 39
18. Reactor Vessel Water Level (RWL) 2* 1* 41
19. Neutron Flux (Extended Range) 2 1 36
20. Containment Hydrogen Concentration 2 1 36
21. Containment Pressure (Extended Range) 2 1 36
22. Steam Generator Blowdown Radiation _

Monitor 1/ blowdown line 1/ blowdown line 40 '

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23. Neutron Flux - Startup Rate (Extended Range) 2 1 36 kh

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  • A channel is eight sensors in a probe. A channel is OPERABLE if four r more' sensors, one or more in the upper section and three or more in the lower section, are OPERABLE.

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    • A total of' 50 thermocouples are provided with 25 thermocouples on each of two trains. Quadrants B and D have 6 thermocouples per train each. Quadrants A and C each have 6 thermocouples on one train N

p and 7 thermocouples on the other. train. No ACTION is required as long as each quadrant has 4 thermocouples per train OPERABLE. ,

ATTACHMENT 2 dgEN 0_

1ABLE 3.3-10 (Continued) 0 CTMiK6I ACTION STATEMENTS AC110N 35 - With the number of OPERABLE channels less than the Minimum Channels Operable requirement, restore at least one inoperable channel 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 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

ACTION 36 - a. With the number of OPERABLE channels one less than the Total Number of Channels requirements, restore one inoperable channel to OPERABLE status within 7 days, or be in at least HOT 5HUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,

b. With the number of OPERABLE channels less than the Minimum ,

Channels Operabic requirements, restore at least one inoperabic channel 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 e HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

ACTION 37 - a. With the number of OPERABLE channels one less than the Total i Number of Channels requirements, restore the inoperable channel to OPERABLE status within 31 days, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

-b, With the number of OPERABLE channels two less than the Total i Number of Channels requirement, restore at least one inoperable channel to OPERABLE status within 7 days, or be in at' least b HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. '

c. With the number of OPERABLE channels less than the Minimum Channels Operable requirement, restore at least one inoperable channel 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 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

ACTION 38 - a. With the number of OPERABLE channels one lev than the Total Number of Channels requirements, restore the inoperable channel to OPERABLE status within 90 days, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, t

b. With tiie number of OPERiwlE channels two less than the Total Number of Channels requirements, restore the inoperable channel to OPERABLE status within 31 days, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
c. With the number of OPERABLE channels three less than the Total Numbre of Channels requirement, restore at least one inoperable o channel to OPf RABLE status within 7 riays, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. ,
d. With the number of OPERABLE channels less than the Minimum Channels Operable requirement, restore at least one inoperable channel 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 SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

SOUTH TEXAS - UNITS 1 & 2 3/4 3-70 t .

. m ido CtMPJ005 l 1 ABLE 3.3-10 (Continued) __

E ACTION ST ATEMENTS (Continued) ATTACH!MNTl ST-HL-AE 33M 6

, PAGE__5.___0F ACTION 39 - a. With the number of OPERABLE channels one leis than the Total Number of Channels requirements, restore one inoperable channel to OPERMLE status within 7 days, or be in at least HOT SHUTDOWIFwithin the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. _

b. With the number of OPERABLE channels less than the Minimum Channels Operable requirements, restore at least one inoperable channel to OPERABLE stttus within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or be in at least HOT SHUTOOWN within tat next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

ACTION 40 - With the number of OPERABLE channels less than the Minimum Channels Operable requirements, restore at least one inoperable channel' to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or be in at least HOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

ACTION 41 - a. With the number of OPERABLE channels one less than the Required Number of Channels, either restore the system to OPERABLE status within 7 days if repairs are feasible without shutting down or prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within 30 days following the event outlining the action taken, the cause of the inoperability and the plars and schedule for restoring the system to OPERABLE status,

b. With the number of OPERABLE Channels one less than the Minimum Channels OPERABLE in Table 3.3-10, either restore the inoperable channel (s) to OPERABLE status within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> if repairs are feasible without shutting down or:
1. Initiate an alternate method of monitoring the reactor vessel inventory;
2. Prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within 30 days following the event outlining the action taken, the cause of the inoperability and the plans and schedule for restoring the system to OPERABLE status; and
3. Restore the system to OPERABLE status at the next scheduled refueling.

ACTION 42 - a. With the number of OPERABLE channels less than 4 thermocouples per quadrant per train, restore these thermocouples to OPERABLE status within 31 days, or be in at least HOT SHUT 00WN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,

b. With the number of OPERABLE channels less than 6 thermocouples per quadrant, restore these thermocouples to OPERABLE status within 7 days, or be in at least H015HUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

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- SOUTH TEXA5 - UNITS 1 & 2 3/4 3-71

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  • ATTACHMENT 2 ST HL AE 33W i PAGE_Je___0F In

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1ABLE 3.3-10 (Continued)

ACTION STATEMENTS.(Continued)  ;

c. With the number of OPERABLE channeh less than 4 thernocouples i per quadrant, restore these thermocouples 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 HDT SHUTDOWN withir the next .

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ACTIOM ONumber a.Withof the number of OPERABLE channels two less tha Channels requirements, restore the inoperable channel

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to OPERABLE status within 31 days, or be in at least HOT i

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SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. i

( b.With the number of OPERABLE channels three less than the Tota Number of Channels requirement, restore at least one inoperable channel to OPERABLE status within 7 days, or be in at least HOT  :

SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

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c. With the number of OPERABLE channels less than the Minimum Channels Operable requirement, restore at least one inoperable

_ channel 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 ,

iOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

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