ML20045E982
| ML20045E982 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/25/1993 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20045E976 | List: |
| References | |
| NUDOCS 9307060272 | |
| Download: ML20045E982 (7) | |
Text
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GGNS PCOL-93/05 i
Markup of Affected Technical Specifications i
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APPLICABILITY:
OPERAIONAL CONDITIONS 1, 2 and 3.
ACTION:
With one M51V leakage control system subsystem inoperable, restore the incperable subsystem to OPERABLE status within 30 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 /> 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 REQUIREMENTS 4.6.1.4 Each MSIV leakage control system subsystem shall be demonstrated OPERABLEC4 b
fa.
t.t le n t once per-n-day F by-veM fying:
N 'B kwer OPERABILITY by starting the blowers from th 1.
rol roon and opeTatia the blowers for at least 15 s.
i 2.
Inboard heater 0 ILQY by rating electrical continuity of the heati.'
R circuitry, by verifying the inboard hea+
raws 8.65 1 10 % ete p er phase.
b.
During eac 0 SHUTDOWN, if not performed within't h M vious J2Aafs, by cycling each motor operated valve through at lea e
c:,-complete-cyc1c cf f u11 trsv r'
g '(A,t least once per 18 months byb
.1: %erformance of a4 functional testa ich-inc4ttdes simulatedh L
trat4en-of--the-sttbs t
ughotit-it+-opeeating sequence andNerifyingthateachautomaticvalveactuatestoitscorr[,
positt the blowers start and the inboard heater draws /
8.65 10L amperes per phase.
Verifyingthbtheblowerdevelopedatleast be w required vacuum at the rat'ed capacity.*
1" H 0 4acuum at 1 100 scfm.
a)
Inboard subsystem N 0" y
Outboardsubsystem,1p[dvacuumat1200scfm.
b)
By verifying the inboard flowf' inboard and outboard pressure, and f o.
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inboard temperature ins offentation to BeqPERABLE by performance of a t
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CHANNEL CHECy s least once per 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />'t;
- NCTIONALTESTatleastonceperDixdays,and CHANNEL)CALIBRATIONatleastonceper18 months 2.
f 3.
CHAN
-t s
s subsystems are not lined up to the main steam lines during the perforlita ce:
-of-this test; GRAND GULF-UNIT 1 3/4 6-7
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3/4.6 CONTAINMENT SYSTEMS Page 3 of 4 BASES 3/4.6.1 PRIMARY CONTAINMENT 3/4.6.1.1 PRIMARY CONTAINMENT INTEGRITY PRIMARY CONTAINMENT INTEGRITY ensures that the release of radioactive materials from the containment atmosphere will be restricted to those leakage paths and associated leak rates assumed in the accident analyses. This restric-tion, in conjunction with the leakage rate limitation, will limit the site.
boundary radiation doses to within the limits of 10 CFR Part 100 during accident conditions.
3/4.6.1.2 CONTAINMENT LEAKAGE f
The limitations on containment leakage rates ensure that the total containment leakage volume will not exceed the value assumed in the accident l
analyses at the peak accident pressure of 11.5 psig P.
As an added conser-vatism, the measured overall integrated leakage rate il further limited to less i
than or equal to 0.75 L during performance of the periodic tests to account for possible degradation of,the containment leakage barriers between leakage tests.
i Operating experience with the main steam line isolation valves has l
indicated that degradation has occasionally occurred in the leak tightness of the valves; therefore the special requirement for testing these valves.
The surveillance testing for measuring leakage rates is consistent with the requirements of Appendix J to 10 CFR 50 with the exception of and uncoupling exemptions granted for testing the airlocks after each openinglast outage of i
the third Type A test of each 10-year service period from the l
that period.
3/4.6.1.3 CONTAINMENT AIR LOCKS The limitations on closure and leak rate for the containment air locks l
are required to meet the restrictions on PRIMARY CONTAINMENT INTEGRITY and the The containment leakage rate given in Specifications 3.6.1.'1 and 3.6.1.2.
specification makes allowances for the fact that there say be long periods of time when the air locks will be in a closed and secured position during reactor cperation.
Only one closed door in each air lock is required to maintain the integrity of the containment.
Verification that each air lock door inflatable i
seal system is OPERABLE by the performance of a local leak-detection test for j
a period of less than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> is permissible if it can be demonstrated that the leakage rate can be accurately determined for this shorter period.
(This is in accordance with Sections 6.4 and 7.6 of ANSI N45.4-1972.)
3/4.6.1.4 MSIV LEAK 4GE CONTROL SYSTEM l
i Calculated doses resulting from the maximum leakage allowance for the main J
steamline isolation valves in the postulated LOCA situations would be a small fraction of the 10 CFR 100 guidelines, provided the main steam line system from l
the isolation valves up to and including the turbine condenser remains intact.
i Operating experience has indicated that degradation has occasionally occurred in the leak tightness of the MSIV's such that the specified leakage requirements have not always been maintained continuously. The requirement ~for the leakage control system will reduce the untreated leakage from the MSIVs when isolation of the_ primary system and containment i re uired.
l L farY O % 0ous Ykla t
WD GULF-UNIT 1 B3/46-1 Amendment No. 89
Attachnu)nt 3 to GNRO-93/00069 i,
Page 4 of 4 Insert new Bases page B 3/4 6-la CONTAINMENT SYSTEMS BASES 3/4.6.1.4 MSIV LEAKAGE CONTROL SYSTEM (Continued)
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.
GRAND GULF-UNIT 1 B/4 6-la Amendment No.
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Page 1 of 3 I
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I Sample Proposed Technical Specifications l
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CONTAINMENT SYSTEMS i
MSIV LEAKAGE CONTROL SYSTEM LIMITING CONDITION FOR OPERATION 3.6.1.4 Two independent MSIV leakage control system (LCS) subsystems shall~ be f
l APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2 and 3.
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ACTION:
i With one MSIV leakage control system subsystem inoperable, restore the inoperable subsystem to OPERABLE status within 30 days or.be in at least HOT i
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 REQUIREMENTS
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4.6.1.4 Each MSIV leanage control system subsystem shall be demonstrated OPERABLE at least once per 18 months by performance of a system functional test.
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GRAND GULF-UNIT 1 3/4 6-7 Amendment No.
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' to GNR0-93/00069 Page 3 of.3 CONTAINMENT SYSTEMS BASES 3/4.6.1.4 MSIV LEAKAGE CONTROL SYSTEM (Continued)
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.
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1 GRAND GULF-UNIT 1 B/4 6-la Amendment No.
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