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{{#Wiki_filter:_                  .
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                                        -
..a LLMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENT j
  ..a   .
3.7. (cont'd) 4.7 (cont'd)
                    ..
E..
LLMITING CONDITIONS FOR OPERATION                       SURVEILLANCE REQUIREMENT                 j 3.7 . (cont'd)                                           4.7 (cont'd)
Drywell-Suppression Clianber E.
E.. Drywell-Suppression Clianber                     E. Drywell-Suppression Chamber Differential Pressure                                   Differential Pressure
Drywell-Suppression Chamber Differential Pressure Differential Pressure 1.
: 1.     Differential pressure between the             1. The pressure differential drywell and suppression chamber                     between the drywell and shall be maintained at equal to                     suppression chamber shall
Differential pressure between the 1.
    'l                 or greater than 1.1 psid except                     be recorded at least once as specified in a, b, and c below,                   each shift.
The pressure differential drywell and suppression chamber between the drywell and shall be maintained at equal to suppression chamber shall
                        .a.:   This differential shall be established within 26. hours af ter placing the mode switch in run.
'l or greater than 1.1 psid except be recorded at least once as specified in a, b, and c below, each shift.
: b. This differential may be de-l                       creased to less than 1.1 psid 24 hours prior to placing mode switch in refuel or shut-d own.
.a.:
: c. This-differential may be
This differential shall be established within 26. hours af ter placing the mode switch in run.
      !                        decreased to less than 1.1 psid for a maximum of four (4) hours during required operability testing of the HPCI system pump, the RCIC system pump, and the drywell-
b.
: i.                           pressure suppression chamber vacuum breakers.
This differential may be de-l creased to less than 1.1 psid 24 hours prior to placing mode switch in refuel or shut-d own.
: 2.       If the differential pressure of specification 3.7.E.1 cannot be maintained, and the differential pressure cannot be restored within
c.
                      . the subsequent six (6) hour period, an orderly shutdown shall be initi-ated and the reactor shall be in -
This-differential may be decreased to less than 1.1 psid for a maximum of four (4) hours during required operability testing of the HPCI system pump, the RCIC system pump, and the drywell-i.
Hot Standby in-six (6) hours and in             .
pressure suppression chamber vacuum breakers.
a Cold Shutdown condition within the following 18 hours.
2.
                                                                                                          !
If the differential pressure of specification 3.7.E.1 cannot be maintained, and the differential pressure cannot be restored within
                                                                                                          -
. the subsequent six (6) hour period, an orderly shutdown shall be initi-ated and the reactor shall be in -
                                                                                                          -
Hot Standby in-six (6) hours and in a Cold Shutdown condition within the following 18 hours.
9
9 80 032107 M
          '
-167a-
                                                            -167a-                     80 032107 M


_
.o,-6 g,,.'+-
            .o,-6 g,,.'+-
J3.7.D'&'4,7,D;(contsd) e
e      J3.7.D'&'4,7,D;(contsd)
- 'The pr'imary containment.is penetrated by several small diameter instrument
                  - 'The pr'imary containment .is penetrated by several small diameter instrument
? lines connected to the reactor coolant system.
                      ? lines connected to the reactor coolant system.           Each instrument line contains-ua 0.25 inch restricting orifice inside the pcisary containment and an excess
Each instrument line contains-ua 0.25 inch restricting orifice inside the pcisary containment and an excess
                                        ~
~
flow' check valve'outside'the primary' containment. A program for periodic testing'and. examination of the excess flow check valves is performed as follows:
flow' check valve'outside'the primary' containment. A program for periodic testing'and. examination of the excess flow check valves is performed as follows:
: 1. LVessel at pressure sufficient to actuate valves.             This.could be at time of= vessel hydro following a refueling outage.
: 1. LVessel at pressure sufficient to actuate valves.
'
This.could be at time of= vessel hydro following a refueling outage.
l2. ' Isolate sensing line from its instrument at the instrument manifold.
l2. ' Isolate sensing line from its instrument at the instrument manifold.
3.- Provide means for observing and ' collecting the instrument drain or
3.-
                              . vent valve flow..
Provide means for observing and ' collecting the instrument drain or
4..     Open vent or drain valve.
. vent valve flow..
4..
Open vent or drain valve.
a.. Observe flow cessation and any leakage rate.
a.. Observe flow cessation and any leakage rate.
Jb . - Reset valve af ter test completion.
Jb. - Reset valve af ter test completion.
: 5.       The head seal leak' detection line cannot be tested in this manner. This valve will not be exposed to primary system pressure except under unlikely conditions of seal f ailure where it could be partially pressurized to reactor pressure. Any leakage path is restricted at the source and there-f ore this valve need not be tested. This valve is in a sensing line that is not safety related.
5.
: 6.       Valves will be accepted if a marked decrease in flow rate is cha'rved and
The head seal leak' detection line cannot be tested in this manner. This valve will not be exposed to primary system pressure except under unlikely conditions of seal f ailure where it could be partially pressurized to reactor pressure. Any leakage path is restricted at the source and there-f ore this valve need not be tested. This valve is in a sensing line that is not safety related.
                              - the leagage_ rate is acceptable.
6.
3.7.E           Bases In conjunction with the Mark -I Containmoit Short Term Progr:m, a
Valves will be accepted if a marked decrease in flow rate is cha'rved and
                              - plant unique analysis was performed as described in, the licensee's letter of October 4,1976, which demonstrated a factor of s afety of
- the leagage_ rate is acceptable.
                              ' at!1 east two for the weakest element in the suppression chazber support system and attached piping. The maintenance of dry well-suppression chamber differential pressure of 1.1'psid and a suppression           l chamber water level corresponding to a downcomer submergens e range of three' to four. fect will assure =the' integrity of the supprension chamber     l
3.7.E Bases In conjunction with the Mark -I Containmoit Short Term Progr:m, a
                              -when subjected to' post-LOCA suppression pool hydrodynamic forces.
- plant unique analysis was performed as described in, the licensee's letter of October 4,1976, which demonstrated a factor of s afety of
        -
' at!1 east two for the weakest element in the suppression chazber support system and attached piping.
,
The maintenance of dry well-suppression chamber differential pressure of 1.1'psid and a suppression l
chamber water level corresponding to a downcomer submergens e range of three' to four. fect will assure =the' integrity of the supprension chamber l
-when subjected to' post-LOCA suppression pool hydrodynamic forces.
I
I
                \
\\
                                  +
+
        ,
~
                            ~
                              .*
Y
Y
                                                                        -184--
-184--
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                        .
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I                    w         j 4Y                              t
*-}}
    '
    *-}}

Latest revision as of 01:10, 2 January 2025

Revised Pages 167a & 184 for Tech Spec Changes Re drywell- Suppression Chamber Differential Pressure
ML19312D171
Person / Time
Site: Cooper Entergy icon.png
Issue date: 03/17/1980
From:
NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML19312D170 List:
References
NUDOCS 8003210382
Download: ML19312D171 (2)
v • d • e


Text

-

..a LLMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENT j

3.7. (cont'd) 4.7 (cont'd)

E..

Drywell-Suppression Clianber E.

Drywell-Suppression Chamber Differential Pressure Differential Pressure 1.

Differential pressure between the 1.

The pressure differential drywell and suppression chamber between the drywell and shall be maintained at equal to suppression chamber shall

'l or greater than 1.1 psid except be recorded at least once as specified in a, b, and c below, each shift.

.a.:

This differential shall be established within 26. hours af ter placing the mode switch in run.

b.

This differential may be de-l creased to less than 1.1 psid 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to placing mode switch in refuel or shut-d own.

c.

This-differential may be decreased to less than 1.1 psid for a maximum of four (4) hours during required operability testing of the HPCI system pump, the RCIC system pump, and the drywell-i.

pressure suppression chamber vacuum breakers.

2.

If the differential pressure of specification 3.7.E.1 cannot be maintained, and the differential pressure cannot be restored within

. the subsequent six (6) hour period, an orderly shutdown shall be initi-ated and the reactor shall be in -

Hot Standby in-six (6) hours and in a Cold Shutdown condition within the following 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />.

9 80 032107 M

-167a-

.o,-6 g,,.'+-

J3.7.D'&'4,7,D;(contsd) e

- 'The pr'imary containment.is penetrated by several small diameter instrument

? lines connected to the reactor coolant system.

Each instrument line contains-ua 0.25 inch restricting orifice inside the pcisary containment and an excess

~

flow' check valve'outside'the primary' containment. A program for periodic testing'and. examination of the excess flow check valves is performed as follows:

1. LVessel at pressure sufficient to actuate valves.

This.could be at time of= vessel hydro following a refueling outage.

l2. ' Isolate sensing line from its instrument at the instrument manifold.

3.-

Provide means for observing and ' collecting the instrument drain or

. vent valve flow..

4..

Open vent or drain valve.

a.. Observe flow cessation and any leakage rate.

Jb. - Reset valve af ter test completion.

5.

The head seal leak' detection line cannot be tested in this manner. This valve will not be exposed to primary system pressure except under unlikely conditions of seal f ailure where it could be partially pressurized to reactor pressure. Any leakage path is restricted at the source and there-f ore this valve need not be tested. This valve is in a sensing line that is not safety related.

6.

Valves will be accepted if a marked decrease in flow rate is cha'rved and

- the leagage_ rate is acceptable.

3.7.E Bases In conjunction with the Mark -I Containmoit Short Term Progr:m, a

- plant unique analysis was performed as described in, the licensee's letter of October 4,1976, which demonstrated a factor of s afety of

' at!1 east two for the weakest element in the suppression chazber support system and attached piping.

The maintenance of dry well-suppression chamber differential pressure of 1.1'psid and a suppression l

chamber water level corresponding to a downcomer submergens e range of three' to four. fect will assure =the' integrity of the supprension chamber l

-when subjected to' post-LOCA suppression pool hydrodynamic forces.

I

\\

+

~

Y

-184--

o I

w j

4 Y t

  • -
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