ML17319A963
| ML17319A963 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 07/15/1981 |
| From: | INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | |
| Shared Package | |
| ML17319A959 | List: |
| References | |
| NUDOCS 8107210427 | |
| Download: ML17319A963 (8) | |
Text
RE'.ACTOR COOLANT SYSTEM REACTOR COOLANT SYSTEM VENTS pny6
/ ~7.
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
3 2
REACTOR COOLANT SYSTEN VENTS The function 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 Thi s sys tem i s de =igned to miti ga te a po s s ibl e cond iti on of i nadequa te core cool i n g ; inade-quate na cira 1 ci rc ul ation, or inabi 1 ity to depre s su rize to Re s i dua 1 Heat Re:;ova 1
System i niti ation condi kion s resulting from the accumulation of non-conden sab e gases in the Reactor Coo 1 ant System.
The reactor vessel head vent and the pressurizer vent a re each des igned with re dundan t safety
- , rade vent pa ths.
Ha ving e ithe r system OPERABLE or having one pa th i n ea ch
- sys tem from oppos ite trains OPERABL E i s s uffici ent to meet the p rovi s ions of Speci fication 3. 4. 5. 2.
P(~u~c DONALO C.
COOK NUCLEAR PLANT UttlT t/OS.
1 AND 2
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.
C t Pr
~
<92'R i-i. i i-tiip) =
(i i
~ ii'
) i (-'%Pppf'"'")i(e,
",r 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.
(3.0~-Cont.
H~ Concentration X
Cont.
Volume I STP Maximum H2 Volume =
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 91'PPENDIX
.A 2000 1500 3CS
'~ressure (PSI) 1000 500 1000..
2000 3000 4000
~'-'
HYDROGEN FLOW RATE (SCm) me
' i $
~
5000
ATTACHMENT 4 TO AEP:NRC:0584