ML17319A963

Proposed Tech Specs for Facility Re RCS Vents

ML17319A963
Person / Time
Site:	Cook
Issue date:	07/15/1981
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17319A959	List: ML17319A958 ML17319A960 ML17319A961 ML17319A962 ML17319A963 ML17331A772
References
NUDOCS 8107210427
Download: ML17319A963 (8)

Text

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RE'.ACTOR COOLANT SYSTEM REACTOR COOLANT SYSTEM VENTS LIMITING CONDITION FOR OPER "iTION

3. 4.5.2 Two redundant Reactor Coolant System Vent (RCSV) paths shall be OPERABLE.

APPLICABILITY: Modes 1, 2 and 3.

ACTION:

a. With only one RCSV path OPERABLE, STARTUP and/or POWER OPERATION may continue provided the inoperable path is mairtained closed with power removed from the valve actuators; otherwise be in HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

b. With no RCSV path OPERABLE within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> either restore at least one path to OPERABLE status or be in HOT SHUTDOWN.

SURVEILLANCE REQUIREMENTS 4.4.5.2 Each RCSV I)4th shall be demonstrated OPERABLE following each refueling by:

a. 'erifying that the upstream manual isolation valve is locked in the opened positi n.

b. Operating each remotely controlled valve through one cycle from the control room.

c. Verifying flow through the RCSV paths during system venting.

Bi,072i0427 Bi0715 PDR ADOCK 050003i5 P PDR

3 2 REACTOR COOLANT SYSTEN VENTS The func t i on of the Reactor Coolant System Vents { RCSV ) i s to remove non -conde n s:-;-

bl es or steam from the reactor vessel head and/o r pressurizer . Th i s sys tem i s de = i gned to mi t i ga te a po s s i bl e cond i t i on of i nadequa te core cool i n g ; i nade-quate na ci ra 1 ci rc u l a ti on , or i nabi 1 i ty to depre s su ri ze to Re s i dua 1 Heat Re:;ova 1 System i n i ti a ti on condi ki on s resulting from the accumulation of non-conden sab e gases in the Reactor Coo 1 an t System.

The reactor vessel head vent and the pressurizer vent a re each des i gned wi th t

re dundan safety :, rade vent pa ths . Ha vi ng e i the r system OPERABLE or having one pa th i n ea ch - sys tem from oppos i te trains OPERABL E i s s u ffi ci ent to meet fi ti the p rovi s i ons of Speci ca on 3 . 4 . 5 . 2 .

P(~u~c UttlT t/OS. 1 AND 2 DONALO C. COOK NUCLEAR PLANT

NOTE: remove or reduce the volume of hydrogen from the containment prior to re-opening the pressurizer vent.

12. Return to the appropriate operating instruction following the successful completion of the venting'.of the pressurizer vapor space.

Harch, 1981 Revision 0 Page S

~ g APPENDIX,A PRESSURIZER VENT GUIDELINE VENTING TIME PERIOD

1. Convert the containment free-volume to containment volume at standard temperature and pressure conditions.

i-i. i i- tiip) = (i ii' i (-'%Pppf' C ~ ",r t Pr "'")i(e, <92'R i ~ ) i..)

FT

• Temperature in degrees Rankine ('F + 460)

~If containment pressure has increased'above 14.7 psia then use 14.7 psig as pressure for conservatism.

2. Determine the containment hydrogen concentration in vo1ume percent units..

i NOTE: The. containment hydrogen concentration will be insigificant if there has been no leakage from'.the RCS to the containment..

3. Calculate the. maximum hydrogen volume ~nat can be vented to the containment which will result in a containment. hydrogen concentration 'f less than or equal to 3 volume percent.

Maximum H2 Volume =

(3.0~-Cont. H~ Concentration X Cont. Volume I STP to be Vented

't

4. From Curve'0l (RCS Pressure vs H2 Flow Rate) determine the allowable venting'period which will limit the containment hydrogen concentration ta 3 volume percent..

Y iilti ii Max. Ho Vented (From Step 3)

Z Flow Rate Mins.

March, 1931, Revision 0 Page 6

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~ ~ CURVE

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~' 91'PPENDIX

.A 2000 1500 3CS

'~ressure (PSI) 1000 500 1000.. 2000 3000 4000 5000

~'-' HYDROGEN FLOW RATE (SCm) me '

i ~

ATTACHMENT 4 TO AEP:NRC:0584