Text

Proposed Tech Spec Change 87-28,moving Requirements from Section3/4.3.3.1, Radiation Monitoring Instrumentation to Section 3/4.3.3.7, Accident Monitoring Instrumentation
	ML20215C106
Person / Time
Site:	Sequoyah
Issue date:	06/10/1987
From:	; TENNESSEE VALLEY AUTHORITY
To:	;
Shared Package
ML20215C104	List: ML20215C101; ML20215C106;
References
	TAC-R00169, TAC-R00170, TAC-R169, TAC-R170, NUDOCS 8706170585
	Download: ML20215C106 (17)
	v • d • e

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p-N ENCLOSURE 1 PROPOSED. TECHNICAL SPECIFICATION CHANGE SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2' DOCKET NOS. 50-327 AND 50-328 i; (TVA-SQN-TS-87-28)

LIST OF AFFECTED PACES Unit-1 3/4 3-40 ]

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INSTRUMENTATION O

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TABLE 3.3-6 (Continued)

TABLE NOTATION ACTION 26 -

With the number of OPERABLE channels less than required by the Minimum Channels OPERABLE requirement, perform area surveys of the monitored area with portable monitoring instrumentation at least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

ACTION 27 -

With the number of.0PERABLE channels less than required by the Minimum Channels OPERABLE requirement, comply with the ACTION requirements of Specification 3.4.6.1.

ACTION 28 -

With the number of OPERABLE channels less than required by the a16 .

Minimum Channels OPERABLE requirement, comply with the ACTION requirements of Specification 3.9.9.

ACTION 29 -

With the number of OPERABLE channels less than required by the Minimum Channels-OPERABLE requirement, within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months initiate and maintain operation of the control room emergency ventilation '

system in the recirculation mode of operation.

0-With the number of OPERABLE RABLE requirement, channels restore theless i than the Minimum _. -

to OPERABLE sta'u

-7 da s Lnannel(s) e ? n at least HOT STANDBY

\jnf'% i' within the next 6 ho n at OWN within the i followin

'-~' and in COLD SHUT 00WN within the suosequen. -

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. dg INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION LIMITING CONDITION FOR OPERATION 3.3.3.7 The : accident monitoring instrumentation channels shown in Table 3.3-10 shall be OPERABLE.

APPLICABILITY: MODES 1, 2 and 3.

ACTION:

a. With the number of OPERABLE accident monitoring instrumentation channels, except for the RCS subcooling margin monitor, less than l}

the Required Number of Channels shown in Table 3.3-10, restore the inoperable channel (s) to OPERABLE status within 7 days, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

b. With the number of OPERABLE accident monitoring instrumentation channels less than the MINIMUM CHANNELS OPERABLE requirements of Table 3.3-10, restore the inoperable channel (s) to OPERABLE status within 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or be in at least HOT SHUTDOWN within the next (Q~!'

m.

12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . -

c. With the subcooling margin monitor inoperable for more than 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months , the minimum shift crew (per Table 6.2-1) will be increased by one member who shall be dedicated to and capable of determining the sub-cooling margin during an accident using existing intrumentation.

SURVEILLANCE REQUIREMENTS 4.3.3.7 Each accident monitoring instrumentation channel shall be demon-strated OPERABLE by performance of the CHANNEL CHECK and CHANNEL CALIBRATION operations at the frequencies shown in Table 4.3-7.

d. With the number of OPERABLE channels for the containment atmosphere monitor,. shield building vent monitor, _- _ .-

- . and condensor vacuum exhaust vent conitor less than the Minimus Channels OPERABLE requirements of Table 3.3-10, initiate an alternate method of monitoring the appropriate parameter (s) within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months and either

' restore the inoperable channel to OPERABLE status within 7 days, or prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within 14 days that provides actions taken, cause of the inoperability and plans and schedule for restoring the channels

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e. The provisions of Specification 3.0.4 are not applicable. _

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CTION STATEMENTS <..;

1 ACTION 26 - With the numoer of'0PERABLE channels less than reouired by the Minimum Channels OPERABLE requiremer.t, perform area surveys of the monitorea area with portable monitoring instrumentation at least once per 24 nours.

ACTION 27 - With tne numoer of OPERABLE channels less than required by the Minimum Channels OPERABLE requirement, comply with the ACTION requirements of Specification 3.4.6.1.

1 ACTION 28 - With the number of OPERABLE channels less than required by the !

Minimum Channels OPERABLE requirement, comply with the ACTION l requirements of Specification 3.9.9.

ACTION 29 - With the numoer of OPERABLE channels less than required by the Minimum Channels GPERABLE requirement, within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months initiate and maintain operation of the control, room emergency ventilation system in tr.e recirculation mode of operation.

1 r i l l n.1 "-

. With the numoer of OPERABLE Channels less than the Minimum Ch ~. ~

l' se tnns u ,

a+ restore the inoperable rw -.d u).to OPERABLE l l Status within 7 days, or ce ' STANDBY within the next

l. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months , and M ; east HOT SHUTDOWN within tn m, rs i SHUTDOWN within the subsequent 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , l

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INSTRUMENTATION ,-..

ACCIDENT MONITORING INSTRUMENTATION Lau n. 3 CONDITION .ER CFtRATION l:

f 3.3.3.7 The accident monitoring instrumentation channels shown in Table 3.3-10 shall be OPERABLE.

APPLICABILITY: MODES 1, 2 and 3.

o ACTION:

l a. With the number of OPERABLE accident monitoring instrumentation ~

L channels, except for the RCS subcooling margin monitor, less than lR3: .

l the Required Number of Channels shown in Table 3.3-10, restore the inoperable channel (s) to OPERABLE status within 7 days, or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

b. With the number of OPERABLE accident monitoring instrumentation channels less than the MINIMUM CHANNELS OPERABLE requirements of -

' Table 3.3-10, restore the inoperable channel (s) to OPERABLE status ,

within 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or be in at least HOT SHUTDOWN within the next (

12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . .

, c. With the subcooling margin monitor inoperable for more than 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months , i the. minimum shift crew (per Table 6.2-1) will be increased by one / l R3: I member who shall be dedicated to and capable of determining the sub-cooling margin during an accident using existing intrumentation.

4 SURVEILLANCE RE0VIREMENTS 4.3.3.7 Each accident monitoring instrumentation channel shall be demon-strated OPERABLE by performance of the CHANNEL' CHECK and CHANNEL CALIBRATION operations at the frequencies shown in Table 4.3-7.

d. With the number of OPERABLE channels for the containraent atmosphere

- ' : * *enoemen, and monitor,. shield building vent monitor, :^:- n -

condensor vacuun exhaust vent monitor less than the Minimus Channels OPERABLE requirements of Table 3.3-10, initiate an alternate method of monitoring the appropriate parameter (s) within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months and either restore the inoperable channel to OPERABLE status within 7 days, or prepare and sutwnit a Special Report to the Commission pursuant to /

Specification 6.9.2 within 14 days that provides actions taken, cause of the inoperability and plans and schedule for restoring the channels to OPERABLE status,

e. The provisions of Specification 3.0.4 are not applicable. -

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, lg ENCLOSURE 2 PROPOSED TECHNICAL SPECIFICATION CHANGE

-SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2

' DOCKET NOS. 50-327 AND 50-328 .i (TVA-SQN-TS-87-28)

DESCRIPTION AND~ JUSTIFICATION FOR.

ACCIDENT MONITORING INSTRUMENTATION 1

l i

l 1

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~* ENCLOSURE 2 I

~

Description of Change The proposed change will move requirements for containment area and noble gas

= effluent monitors from Section 3/4.3.3.1, " Radiation Monitoring

- Instrumentation," to Section '3/4'.3.3. 7,' " Accident Monitoring Instrumentation." .This change will also correct a typo on page 3/4 3-42;

" Moses" should be " Modes." ,

Reason for Change In a January 25,'1984 letter from L. M. Mills to E. Adensam, TVA submitted a requested change to'SQN units 1 and 2 technical specifications as required by NUREG-0737 and Generic Letter 83-37.- NRC requested additional information to complete the review of Table 3.3-6, " Radiation Monitoring Instrumentation."

The-alarm / trip setpoint had been left blank for the noble gas effluent monitors. A.setpoint or a statement indicating'that the setpoint is not applicable needed to be provided. TVA efforts to provide the additional information.resulted in the'need for additional changes. To avoid confusion, y the changes involving Section 3/4.3.3.1, " Radiation Monitoring Ins trumen at tion," are being withdrawn and resubmitted herewith.

Containment radiation and noble gas effluent monitors provide information, during and following an accident, which is considered helpful to the operator in assessing the plant condition. These monitors have been installed and, therefore, should be added to the list of accident instrumentation.

Justification for Change NUREG-0737,' item II.F.1.1, required that nchie gas effluent monitors be

' installed with an extended range to function during accident conditions as well as normal operating conditions. TVA has installed Eberline model Nos.

SA-14 and SA-15 noble gas monitors for shield building exhaust vent and condenser vacuum exhaust vent. The SA-14 model is a mid-range monitor with a

- range of 10-3 to 101 mci /cc and the SA-15 model is a high-range monitor with a range of 10-1 to 105 mci /cc. The low-range monitors for these release paths are already included in technical specification 3.3.3.10.

NUREG-0737, item II.F.1.3, required that containment high-range radiation level monitors be installed with a maximum range of 10 8 rad /hr (total radiation) or 10 7 R/hr (photon radiation only). TVA has installed General Atomic model No. RD-23 monitors in the lower and upper compartments of containment. These monitors have a range of 1 to 10 8 R/hr.

The surveillance requirements for accident monitoring instrumentations require a monthly channel check and a channel calibration every refueling outage.

Because of the extended ranges of the noble gas and containment area monitors, a footnote will be added to allow electronic calibration of the upper ranges and a point calibration check of the lower ranges. These requirements will ensure equipment operability.

The proposed changes are consistent with the NRC Standard Technical Specifications (NUREG-0452, Revision 5).

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,' 1 g.i ENCLOSURE 3-PROPOSED TECHNICAL SPECIFICATION CHANCES SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 (TVA-SQN-TS-87-28)-

DETERMINATION OF.NO SIGNIFICANT HAZARDS CONSIDERATIONS FOR CHANGES TO RADIATION AND ACCIDENT MONITORING INSTRUMENTATION h

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2-ENCLOSURE 3 SIGNIFICANT HAZARDS CONSIDERATIONS

1. Is the probability of an occurrence or the. consequences of an accident previously evaluated in'the safety analysis report significantly

. increased?

No. The containment area and noble gas monitors provide helpful-information to the operator in assessing the plant condition during and

.following an accident'. The consequences of an accident or occurrence previously evaluated may actually.be reduced because,of the extended

. range of the containment' area monitors.and the installation of additional diagnostic equipment provided by the noble gas monitors.

2. Is the possibility'for an accident of a new or different type than evaluated ~previously in the safety analysis report created? 4

'No. Installation of the high-range radiation monitors does not create the possibility for a new or different type of accident than previously analyzed. The monitors only connect to the release paths. .

3. Is the margin of safety significantly reduced?

No.. The margin of safety is actually increased because of the additional diagnostic capabilities. The high-range radiation monitors are required

< to be operable,-and out-of-service times for this equipment are limited by the action statements.

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ML20215C106

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