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


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..J ATTACHMENT 1.

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flNSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION-

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'3.3.3.6.;The accident monitoring instrumentation channels shown in Table 3.3-10' shall be,0PERABLE-

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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 N

and D have 6 thermocouples per train each.

Quadrants A and C each have 6 thermocouples on one train 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 N

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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 b

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 />.

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 channel to OPf RABLE status within 7 riays, or be in at least HOT o

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.

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1 ABLE 3.3-10 (Continued)

ATTACH!MNTl E

ACTION ST ATEMENTS (Continued)

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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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

'PL-3.2]urs.

mp ACTIOM O a.With the number of OPERABLE channels two less tha Number of Channels requirements, restore the inoperable channel to OPERABLE status within 31 days, or be in at least HOT

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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 />.

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i b.With the number of OPERABLE channels three less than the Tot

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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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