ML20078S514

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Proposed TS Consisting of Changes to SR 4.4.1.4.a.1 & 4.6.1.4.a.2
ML20078S514
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 02/14/1995
From:
ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20078S254 List:
References
GNRO-95-00017, GNRO-95-17, NUDOCS 9502240194
Download: ML20078S514 (8)
v • d • e


Text

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GrAo - 95/co D I 7 Endese 1

% cf I .T l CONTAINMENT SYSTEMS 3/4.6.2 DRYWELL DRYWELL INTEGRITY LIMITING CONDITION FOR OPERATION 3.6.2.1 DRYWELL INTEGRITY shall be maintained.

APPLICABILITY: OPERATIONAL CONDITIONS 1, nd 3.

ACTION:

Without DRYWELL INTEGRITY, restore DRYWELL INTEGRITY within I hour 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 /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

SURVEILLANCE REOUIREMENTS ,

I 4.6.2.1 DRYWELL INTEGRITY shall be demonstrated:

a. At least once per 31 days by verifying that all drywell penetra-tions** not capable of being closed by OPERABLE drywell automatic isolation valves and required to be closed during accident conditions are closed by valves, blind flanges, or deactivated automatic valves secured in position, except for valves that are opened under administrative control as permitted by Specification 3.6.4. j
b. By verifying the drywell air lock is in compliance with the )

requirements of Specification 3.6.2.3.

c. By verifying the suppression pool is in compliance with the requirements of Specification 3.6.3.1.
d. By verifying drywell bypass leakage is less than or equal to 10% of the bypass leakage limit at least once per 18 months.

(Not required to be performed until entry into MODE 2 on the first plant startup from the eighth refueling outage.)

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l MS : Sp:: h! Te t E : g tien 3.10. b

    • Except valves, blind flanges, and deactivated automatic valves which are located inside the drywell or containment and are locked, sealed or otherwise secured in the clored position. These penetrations shall be verified closed during each COLD SHUTDOWN except such verification need not be performed more often than once per 92 days.

GRAND GULF-UNIT 1 3/4 6-13 Amendment No. M ,102 l 9502240194 950214 1 PDR ADOCK 05000416 W ___ __ __ __ ___ CD

GNRO-95/00017 Enclosure 3 Page 1 of 1 Additional Information Concerning the Pretreatment Radiation Monitor Following the implementation of NEDO-31400,to minimize nuisance alarms GGNS has chosen to use an Offgas Pretreat Hi radiation alarm setpoint of either 2x the normal background radiation at the detector location or 20 mR/hr, whichever is greater. The Offgas Pretreat Radiation Hi and Hi-Hi trips have an alarm only function with no automatic actions. Current Technical Specification section 3.11.2.7 requires "The gross radioactivity (gamma) rate of the noble gases measured at the Offgas recombiner effluent shall be limited to less than or equal to 380 millicuries /second, after 30 minutes decay". If this specification is exceeded, the Specification requires the release rate to be restored to its limit 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 SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The Offgas Pretreat Radiation Hi-Hi setpoint is calculated using a conservative equation to help ensure this Technical Specification limit is not exceeded. This equation is inversely proportional to the Offgas flowrate. This Hi-Hi alarm setpoint ensures that the NEDO-31400 Section 7 assumptions for the Offgas pretreatment monitor are met, since the NEDO states that a change associated with a noble gas release rate in the range of 1 to 10 Ci/sec would be promptly annunciated. In addition, implementation of Technical Specification Section 4.11.2.7.2.b requires the gross radioactivity release rate of the noble gases from the main condenser air ejector be determined to be within the limits of Specification 3.11.2.7 by performing an isotopic analysis of a representative sample of gases taken at the offgas recombiner effluent fo!!owing a 50% increase in 4 hrs or a 100 mr/hr reading as indicated by the Offgas Pretreatment Monitor. Using conservatively typical values, a Hi setpoint of 2x background would be less than 1% of the Hi-Hi setpoint and 20 mR/hr would be on the order of 0.3% of the Hi-Hi setpoint, both with an assumed offgas flowrate of 50 cfrn.

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GNRO-95/00017 Enclosure 4 Page 1 of 6 Discussions of Changes: i LA.2 The details of the methods and acceptance values for these tests are relocated from the Technical Specifications to the UFSAR and Technical Specification Bases and the control of 10CFR50.59. The v:.iues are system design values which are additional control by design change procedures and regulations. l LA.3 These motor operated valves are required to be cycled in accordance with the ASME Section XI Inservice Testing (IST) Program as specified in the Administrative Controls Section of the proposed Technical Specifications. Consistent with the BWR Standard Technical Specifications, NUREG-1434, these IST details are not repeated in the proposed Technical Specifications. The requirement for this testing is relocated from the Technical Specifications to the UFSAR and Technical Specification Bases and the control of 10CFR50.59.  ;

LA.4 The MSIV-LCS is a manually actuated system. The instrumentation being tested by the existing surveillance provides operational interlocks and automatic system shutdown for .

the system at various conditions. Many systems specified in the Technical Specifications l have system-internal operational functions that are not detailed within the Specification itself. The OPERABILITY of the system and of these controls is considered part of the system functional testing. Proposed SR 3.6.1.8.3 will inherently perform a functional test of the instruments, and confirms the proper calibration of the channels. These requirements are relocated from the Technical Specifications to the UFSAR and Technical Specification Bases and the control of 10CFR50.59.

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CONTAINMENT SYSTEMS LCo 3. 6. l. 6 MSIV LEAKAGE CONTROL SYSTEM LIMITING CONDITION FOR OPERATION  ;

LCO 3.6.1.4 Two6ndepende_r(M leakage control system (LCS) subsystems shall be 3.lel- OPERABLE.

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APPLICABILITY: OPERATIONAL C0 ONS 1, 2 and 3.

ACTION: MS d C =^ D eakage control system subsystem inoperable, restore the inoperable ,

c. g With one MSIVsubsystem to OPERABLE status within 30 days or be in at least HOT SH!

C_eNO4 the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. f SURVEILLANCE REQUIREMENTS l

4.6.1.4 Each MSIV leakage control system subsystem shall be demonstrated OPERABLE

a. At least once per 31 days by verifying.

S e, 7,< . f .'3 4 1. Blower OPERABILITY by starting the blowers from the control room and operating the blowers for at least 15 minutes.

Inboard heater OPERABILITY by demonstrating electrical l

$ R 3.02.1.T. 2 2.

continuityoftheheatingelement_circuitryfl~byverifying}

Og ,] -ithe inocard heater draws 5.b31 10% amperes per_ phase, During each COLD SHUTDOWN, if not performed within the previous Og,3 , N(b.92 days, 1

by cycling each motor operated valve through at least one (complete cycle of full travel. y

c. At least once per 18 months by:

$# h 'A 3 1. hich includes simulated Performanceofafunctionaltes[houtitsoperatingsequence, actuation of the subsystem T.nroug and verifying that each automatic valve actuates to its correct ,

I position, the blowers start and the inboard heater draws l

8.65 1 10% amperes per phase. 1 LA2 2. Verifying that the blower developed at least the below required vacuum at the rated capacity.*

a) Inboard subsystem,10" t 1" H O 2 vacuum at > 100 scfm.

- b) Outboard subsystem, > 15" H,0 vacuum at > cf L A. d. By verifying the inboard flow, inboard and outboard pressure, cod .

- inboard temperature instrumentation to be OPERABLE by perforur;ce of a:

1. CHANNEL CHECK st least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,
2. CHANNEL FUNCTIONAL TEST at least once per 31 days, and
3. CHANNEL CALIBRATION at least once per 18 months.,

LAA s [ '

  • Thesubsystemsarenotlineduptothemainsteamlinesduringtheperformance) of this test.

GRAND GULF-UNIT 1 3/4 6-7

G n R> 1S/*an E ., et. sore V i P-5' 3 5 b MSIV LCS 3.6.1.9 1

3.6 CONTAINMENT SYSTEMS 3.6.1.9 Main Steam Isolation Valve (MSIV) Leakage Control System (LCS)

LCO 3.6.1.9 Two MSIV LCS subsystems shall be OPERABLE.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One MSIV LCS subsystem A.1 Restore MSIV LCS 30 days inoperable. subsystem to OPERABLE status.

B. Two MSIV LCS B.1 Restore one MSIV LCS 7 days subsystems inoperable. subsystem to OPERABLE status.

C. Required Action and C.1 Be in MODE 3. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time not met. M C.2 Be in MODE 4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.6.1.9.1 Operate each MSIV LCS blower 31 days G157 minutes.

(continued) i l

BWR/6 STS 3.6-27 Rev. O, 09/28/92  !

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G AG O~ASfoo 00 (n el wee 4 i fag 4 o f G l MSIV LCS 3.6.1.9 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY l

SR 3.6.1.9.2 Verify electrical continuity of each 31 days

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inboard MSIV LCS subsystem heater element ,

ci rcui try.

SR 3.6.1.9.3 Perform a system functional test of each 118fmonths MSIV LCS subsystem.

l BWR/6 STS 3.6-28 Rev. O, 09/28/92

q,# o -95/ o ool 1 g..,ef s a n s4

@ ## MSIV LCS B 3.6.1.9 BASES ACTIONS C.1 and C.2 (continued) l If the MSIV LCS subsystem cannot be restored to OPERABLE i status within the required Completion Time, the plant must be brought to a MODE in which the LCO does not apply. To achieve this status, the plant must be brought to at least MODE 3 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and to MODE 4 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.

SURVEILLANCE SR 3.6.1.9.1 REQUIREMENTS Each MSIV LCS blower is operated for til5[ minutes to verify OPERABILITY. The 31 day Frequency was developed considering the known reliability of the LCS blower and controls, the two subsystem redundancy, and the low probability of a significant degradation of the MSIV LCS subsystem occurring between surveillances and has been shown to be acceptable through operating experience.

SR 3.6.1.9.2 The electrical continuity of each inboard MSIV LCS subsystem

.: eater is verified by a resistance check, by verifying the rate of temperature increase meets specifications, or by verifying the current or wattage draw meets specifications.

The 31 day Frequency is based on operating experience that has shown that these components usually pass this Surveillance when performed at this Frequency.

SR 3.6.1.9.3 A system functional test is performed to ensure that the MSIV LCS will operate through its operating sequence. This includes verifying that the automatic positioning of the valves and the operation of each interlock and timer are correct, that the blowers start'and develop the required flow rate and the necessary vacuum, and the upstream heaters meet current or wattage draw requirements (if not used to verify electrical continuity in SR 3.6.1.9.2). The 18 month (continued)

BWR/6 STS B 3.6-52 Rev. O, 09/28/92 1

t GNA 3 -Woost 7 cac c5uce 4

, 9 684 MSIV LCS B 3.6.1.9 BASES SURVEILLANCE SR 3.6.1.9.3 (continued)

REQUIREMENTS Frequency is based on the need to perform this Surveillance under the conditions that apply during a plant outage and the potential for an unplanned transient if the Surveillance wer performed with the reactor at power.fgating x ience has n that thes onents usua pass the C2 '

Survei nce when formed at t ] month Fre ncy.

efore, the Frequen was conclu to be accepta from a re bilit standpoint.J REFERENCES @ @ l. (AFSAR,Sectiob6.7[.i.

2. ns.w, = :.r.,s...-:= m >

( uFSAR, SectioN15.6.5[  !

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I BWR/6 "TS B 3.6-53 Rev. O, 09/28/92

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