ML20058M917

Proposed Tech Specs Allowing Maint of RHR Sys Operable W/Min Flow Valve Disabled in Closed Position When Sys in Shutdown Cooling Mode of Operation

ML20058M917
Person / Time
Site:	Fermi
Issue date:	08/02/1990
From:	DETROIT EDISON CO.
To:
Shared Package
ML20058M909	List: ML20058M917 NRC-90-0127, Application for Amend to License NPF-43,permitting Util to Maintain RHR Sys Operable W/Min Flow Valve Disabled in Closed Position When Sys in Shutdown Cooling Mode
References
NUDOCS 9008130125
Download: ML20058M917 (9)

Text

- }

L I

4 d

P P

I:

P i i t PROPOSED CHANGES  ;

i t

i e

s i

t

)

6 1-

?

9008130125 900802 PDR ADOcn 0500g,{,gi P *

\.

(;.  :!

. i i

, i.

i ,

1 1

1 1

j j

i i

., i i

l

,L PROPOSED CHANGES i

t t

i t

k t

l i

1 f

)

5 l

l

~

9008130125 900802 PDN ADOCK03OOg,{,gt P

k.

RfAC40E COOLANT SYlttk.

l 3/4.4.g Rt5100ALNEATREMOVAk ' '

L NOT SHUTDOWW l LIMITING C0kDIT10k FOR OPERATION . - . .

]

3.4.9.1 Two# shutdown cotling sede loops of the residual heat removal (RHR) l syster. shall be OPERAllt 9 Nd, at least one recirculation shall be in I operation er, at least one shutdown cooling sede loop sha 1 e in operation *H

'with each loop consisting of at least:

L a. One OptRABLE RHR pump, and

b. One OptRABLE RHR heat exchanger.

APPL' CAB'L"TY: OPERATIONAL CONDITION 3, with reactor vessel pressure less than Ine um cu';.in permissive setpoint.

3:

a. With less than the abcve required RHR shutdown cooling sede loops 1spediately initiate corrective action to return the i OPERAtti, required loops to OPERABLE status as soon as possible.

Within  !

4 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, verify the  !

OPERAt1LITY of at least one siternate eethod capable of decay heat

. reseval for each inoperable RHR shutdown cooling sede loop. Se in e at least COLD 5HUTDOWN within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.**

b. With neither a recirculation pump mor en RHR shutdown cooling mode .

loop in operation, temsdiately initiate corrective action to return 1 either at least one recirculation poet er at least one RNR shutdown 8 cooling sede loop to operation as soon as possible. Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> establish reactor coolant circulation by an , alternate sothed and conitor reactor coolant temperature and pressure at least once per '

i hour.

c. The provisions of Specification 3.0.4 are not applicable for up to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for the purpose of estabitshing the RHP system in the shut.

down cooling sede once the reactor vessel pressure is less than the RHR cut.in permissive setpoint.

i i

SURVE1LLANCE REQUIREMENT $ - . . . . . .. . .. ...

i 4.4.9.1.1 At least one shutdown tooling sede loop of the residual heat reseval

. nystes,or at least one recirculation purp shall be determined to be in operation and circulating reactor coolant at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. ,

i __ -

1. 0ne RHR shutdown cooling sede loop may be inoperable for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing.

• The shutdown cooling pump may be removed from operation for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> .

per 8. hour period.

HThe RNR shutdown cooling sede loop may be roueved from operation during hydrostatic testing.

• • Whenever both RHR shutdown cooling sede loops are inoperable, if unable to attain COLD SHUTDOWN as required by this ACTION, maintain reactor coolant temperature as low as practical by use of alternate heat reseval sethods.

N With the RHR pump suction path aligned to the reactor pressure vesset f or shutdown cooling the RHR minimum flow valve may be doenergized in the closed position.

, FERM1 . UNIT 2 <

3/4 4 26 < ._

1 1

. . , I REACTOR COOLANT SYSTEM COLD SHUTDOWN LIMITING CONDITION FOR OPERATION 3.4.9.2 Reactor water level shall be maintained greater than er equal to 214 inches and two# shutdown e ing mode loops of the residual heat removal (RHR) system shall be OPERABLE , at least one recirculation pump shall be in operation or at least one shutdown cooling mode loop shall be in operation *##

with each loop' consisting of at least:

a. One OPERABLE RHR pump, and

b. One OPERABLE RHR heat exchanger.  :

APPLICABILITY: OPERATIONAL CONDIT!0N 4 when irradiated fuel'is in the reactor vessel and the water level is less than 20 feet 6 inches '

above the top of the reactor pressure vessel flange and heat I losses to ambient are not sufficient ** to maintain OPERATIONAL  !

CONDITION 4.

ACTION:

a. With less than the above required RHR shutdown cooling mode loops ,

OPERABLE, within I hour and at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, l verify the operability of at least one alternate method capable  ;

of decay heat removal for each inoperable RHR shutdown cooling mode  :'

loop.

b. With neither a recirculation pump nor a RHR shutdown cooling mode loop '

in operation, immediately initiate corrective action to return either M-at 'least one recirculation pump or at least one RHR shutdown cooling mode, loop to operation as soon as possible. Within I hour establish W..i reactor coolant circulation by an alternate method and monitor reactor coolant temperature and pressure at least once per hour.

c. With reactor water level less than 214 inches, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> restore '

reactor water level to the required level or place two recirculation ,

pumps in operation or place two RHR shutdown cooling mode loops in operation.

d. The provisions of Specification'3.0.4 are not applicable for up to ~!

4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for the purpose of establishing the RHR system in the shut-down cooling mode once the reactor vessel pressure is less than f the RHR cut-in permissive setpoint.

l- #0ne RHR shutdown cooling mode loop may be inoperable for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing.

• The shutdown cooling pump may be removed from operation for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per i 8-hour period.

• • Ambient losses must be such that no increase in reactor vessel water tempera-ture will occur (even though COLD SHUTDOWN conditions are being maintained). s

1. 1. The RHR shutdown cooling pump may be removed from operation during hydrostatic testing, gg With the RHR pump suction path aligned to the reactor pressure vessel for shutdown cooling the RHR minimum flow valve may be doenergized in the closed position.

FERMI - UNIT 2 3/4 4-28

1

?

I l 1

l l

i 1/4.5 tutisiniY tett te0L1W SYSTtsts 1/4.6.1 tett GPttATING r LIMITIM MIT10N FOR SPttATION .

3.6.1 The emerpency more seeltag systems she11 he SPt4ABLE with: -

a.

The sore spray eyetes (C&$) eensisting of two eespetans with each!

j sesyst e prised ef:

1. Two GPERABLt CSS pops, and I i

2. An 09ttAllt flow path sepable of taking section fr sporger to the reacter sessel.

The low pressure teolant inbeetten (Lpt!) system of the residual

b. ng of two sesystems with each heat removal systes consist'

• sesystem semprised of: *

1. Two OPERABLt LpCI (RNR) pups, and

2. An OttttBLt flow path capable of takins evetion from the; suppression vessel.*** -

c.

The high pressure tooling injection (NPCI) system consisting of: -

1. One OtttABLt WPCI pop, and

2. An OPinABLt flow path capable of takins sect sessel.

' ~

d.

The automatic sepressurisation system (ADS) with at least fire  !

GPLAABLE ADS valves. ,

OPERATIONAL DONDITION 1, l' ** # and 9' **.

' AttL1 cat 1L1W:

• N NPCI system is est reevired to be OPitABLE shen reacter steen een ,

ptessued is less then er eeus) to 160 peig.

• • The ADS is not toevived ta be OPERAlt! when teatter steam es less then er eeus1 to 160 psig. operator action is voevived to

• • • upon voceipt of an LpCI initiation signal, faci 11 tate LpCI eperetten if the eenvally open the teres suction valves toLpCI system is in th 4

tien 3,4.9.1.

flee Specisi fest taception 3.10.6. l f or shutdorm M With the RHR pump ouction poth eligned to the reactor pressure d position.

vesse cooling the RHR minimum flow valve may be doenergized in the close ,

8/4 6-1 l* FERN 1

• UNIT 2 u - ey e%- **+--yev wy-- s-e.w,-,p--.-m_,,m,w,.-_vg e_

-_m_,--- w

e

• 1 i

, *-l

}

E4tRCfNCY CORf COOLING SYSTEMS

) .!

3/4 s.1 Etts - snut m I

. .3

$1MITINC m a! TION FOR OPERATION 3.5.2 At least two of the fo11 swing sesystems shall De OPERABLE:

a. 1 Core apety system (C$l) sesystems with a subsystem sosprised of:  !

1.

At least two opt 4ABLE CS$ pumps, and t.

An OPERABLt flow path aapa' ale of taking section free at least l, one of the following wetet segrees and transferring the water i

' through.the spray sparger to the reacter vessel:

l a) free the sup m ssten thenber, or +

b) ,

When the suppression cheeber water level is less than the liett required in Specification 3.5.3 or is 'erained, from the condensate storage tank containing at least 150,000 18 feet, gallons of water, equivalent to a level of available b.

Low pressure subsystem coolant comprised of: injection (LPCI) system subsystems with a '

1.

&w At least two OPERABLE LPCI (RNR) pueps, and )

2.

An OPERABLE flow path capable of taking section from the  !

suppression chamber and transferring the water to the reactor vesse1**g hPLICABILITY: OPERATIONAL CONDITION 4 and $*.

, $$3.D  !

a.

With one of the above reevired subsystes(s) inoperable, restore at all operattens with a potential for draining the react '

b.

u With botn of the above reevired subsystems inoperable, suspend C0tt ,

ALTERATIONS reacter vessel. Restore and all operations with a potential for draining the >

at least one subsystem to OPERABLE status within the next 4 hours er establish SECONDARY CONTAllMENT INTIG 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

• The ECCS is not reeutred to be OPERABLE provided that the reacter vessel water level is maintained within the limits of Specificat

• • Upon receipt of a LPCI initiation signal, operator Mtion is required to manually open the ter9s suction valves to Qtilite'.e LPCI operation if the LPCI

• With the RHR pump suction path aligned to the reactor pressure )

sel for shutdown FERNI - UNIT 2 cooling the RHR minimum flow valve may be doenergized in the closed po 3/4 5-6 .

,- - - - - e. . , . , . , -e.,w_..

. O I a4 . .

)

I CONTAllMENT SYSTEMS SUPPRES$10N p00L AND BRYWELL SPRAY

'i LIMITING CONDIT10N FOR OPERATION i i

).6.2.2 The suppression pool and d 1 spray mode of the residual heat reaeval (RNR) system shall be OPERABL consisting off tth two indepefJent leaps, each leep

s. One OPERABLE RNR pump, and .

6. An DPERABLE flow path capable of recirculating water free the s

L suppression chamber through an RNR heat anchanger and the suppressieh  !

pool and drywell spray spargers.

1 APPL 1tABILITY: OPERATIONAL CONDITIONS 1, 2, and 3. I sus l a.

t With one suppression pool and/or drywell spray feep. inoperable, l restore the inoperable loop to OPERA 8LE status within 7 days or be in et least N07 SMUT 00WN 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

$HUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, b.

With both suppression pool and/or de m 11 spray loops inoperable, restore at least one loop to OPERA 8L: status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in at least HOT $HUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN" within the followine 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. )l SURVEILLANCE REDVIREMENT$

=

)

4.6.2.2 The suppression pool and drywell spray mode of the RNR system shall be temonstrated OPERA 8LE: '

a. l At least once per 31 days by verifyin0 that each valve (manual, power-operated, or automatic) in the flow path that is not locked, sealed, or otherwise secured in positten, is in its correct position. '

b. By verifyin0 that each of the required RNR pumps develops a flow of at least 500 spe on rectreulation flow through the RNA heat exchanger and suppre ton pool spray sparger when tested pursuant to Specification 4.0.e.

c. By performance of an air er smoke flow test of the drywell spray nettles at least once per 6 years and verifyin0 that each spray nettle is unobstructed.

"Whenever both RNR subsystems are inoperable, if unable to attain COLD SNUTDOWN as required by this ACTION, maintain reacter teclant temperature as low as practical by use of alternate heat removal methods. g With the RHR pump suction path aligned to the reactor pressure vessel for shutdown cooling the RHR minimum flow valve may be doenergized in the closed position.

FERNI - UNIT 2 3/4 6 14

r. _ .w,-_. ..____ _ _ _ _ _ _ . . _. ...--,_,,~_4 .-.wm..,,_...,..r._,m., _ , , . , , , , , , . . ..,--., . ,7 , .,, , . _ , . . . . . , y y.,. ,v.y

.. g 1

CONT AINMENT SYSTEM $

) SUPPRt$110N POOL COOLING LIMITING i.GiGITION FOR OptRATION j

3.6.2.3 The suppressiespool cooling sede of the residual heat removal (RNR) i systes shall be OPERAllt%1th two independent loops, each loop consist

s. One OPERABLE RNR pump, and  !

l b.

An OPERABLE flow path capable of rectreulating water from the ,

suppression chamber through an RNA heat enchanger. )

E ' J i: - OPERATIONAL CONDITIONS 1, 2 and 3.

' A>>LICABILITY: \

i I

g_Ti(LN: ,

l

'

• a.

With one suppression pool cooling loop inoperable, restore the i HDT $HUTDOWN 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 the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

b.

With both suppression pool cooling loops inoperable, be in at least NOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD $ NUT 00W 1 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

l

$URVE1LLANCE REQUIREMENT $

The suppression pool cooling mode of the RNR system shall be 4.6.2.3- ,

. demonstrated OPERABLE:

i

a. At least once per 31 days by verifying that each valve (sanuel,inl power operated, or automatic)in position, is in its correct position.

sealed, o,r otherwise secured

b. Sy verifying that each of the required RHR pumps develops a flo at least 10,000 gpm on rectrevlation flow through the RNA heat exchanger and the suppression pool when testeG purcuant to Specification 4.0.5. .

COLD SHUTDOWN "Whenever both RHR subsystems are inoperable, if un practical by use of alternate heat removal methods.

With the RHR pump suction path aligned to the reactor pressure vessel for shutdown o

cooling the RHR minimum flow valve may be doenergized in the closed position, e-3/4 6-19 FERMI - UNIT 2 - ,

e

. . --.e- - , m . , , - - e,,,,,

, -% ,--.. , - . . - . .-.--,vv--

~ _ _ __.~_______ __

. s I

REFUELING OPERATIONS ,

3/4.9.11 RE51 DUAL HEAT REMOVAL AND COOLANT CIRCULATION r HIGH WATER LEVEL ,

LIMITING CONDITION FOR OPERATION l

3.9.11.1 At le'ast one shutdow cooling mode loop of the residual heat removal 'l (RHR) system shall be OPERABL with at least:

a. One OPERABLE RHR pump, and

b. One OPERABLE RHR heat exchanger.

APPLICABILITY: OPERATIONAL CONDITION 5, when irradiated fuel is in the reactor vessel and the water level is greater than or equal to 20 feet 6 inches above ,

the top of the reactor pressure vessel flange and heat losses to ambient

• are ,

not sufficient to maintain OPERATIONAL CONDITION 5.

ACTION:

With no RHR shutdown cooling mode loop OPERABLE, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, verify the OPERABILITY of at least one alternate '

method capable of decay heat removal. Otherwise, suspend all operations involving an increase in the reactor decay heat load and establish SECONDARY -

CONTAINMENT INTEGRITY within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

f~ SURVEILLANCE REQUIREMENTS 4.9.11.1 At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> verify at least one RHR shutdown cooling mode loop is capable of taking suction from the reactor vessel and discharging back to the reactor vessel through an RHR heat exchanger with available cooling water. ,

1 i

l.

l

" Ambient losses must be such that no increase in reactor vessel water temperature i

will occur (even though COLD SHUTDOWN conditions are being maintained).

, i .

- With the RHR pump suction path aligned to the reactor pressure vesset for shutdown cooling the RHR minimum flow valve may be desnergized in the closed position.

, 'l

.]

FERMI UNIT 2 3/4 9-16

. ' REFUELING OPERATIONS

.- LOW WATER LEVEL l LIMITING CONDITION FOR OPERATION 3.9.11.2 Reactor water level shall be maintained greater than or equal to 214 inches and two# shutdown c ng mode loops of the residual heat removal  :

(RHR) system shall be OPERABL .d, at least one recirculation pump shall be in .

operation, or at least one shutdown cooling mode loop shall be in operation *##

with each loop cbnsisting of at least:

a. One OPERABLE RHR pump, and

b. One OPERABLE RHR heat exchanger.

APPLICABILITY: OPERATIONAL CONDITION 5 when irradiated f uel is in the reactor i vessel and the water level is less than 20 feet 6 inches above the top of the '

reactor pressure vessel flange and heat losses to ambient* are not suf ficient to maintain OPERATIONAL CONDITION 5.

ACTION:

a. With less than the above required RHR shutdown cooling mode loops OPERABLE, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, verify the operability of at least one alternate method capable of decay heat removal for each inoperable RHR shutdown cooling mode loop. l

b. With neither a recirculation pump nor an RHR shutdown cooling mode loop in operation immediately initiate corrective action to return either at least one recirculation pump or at least one RHR shutdown cooling mode loop to operation as soon as possible. Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> establish reactor coolant circulation by an alternate method and monitor reactor coolant temperature and pressure at least once per hour,

c. With reactor water level less than 214 inches, within I hour restore i reactor water level to the required level or place two recirculation pumps in operation or place two RHR shutdown cooling mode loops in operation.

SURVEILLANCE REQUIREMENTS i

4.9.11.2.1 At least one shutdown cooling mode loop of the residual heat removal system or at least one recirculation pump shall be determined to be in operation and circulating reactor coolant at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

4.9.11.2.2 Verify reactor water level to be greater than or equal to 214 inches at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

4.9.11.2.3 At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> verify the required RHR shutdown cooling mode loop (s) are capable of taking suction from the reactor vessel and dis- i charging back to the reactor vessel through the RHR heat exchanger (s) with their associated cooling water available.

1. 0ne RHR shutdown cooling mode loop may be inoperable for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing.

"The shutdown cooling pump may be removed from operation for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per 8-hour period.

1. 1. The RHR shutdown cooling pump may be removed from operation during hydrostatic -

testing.

• • Ambient losses must be such that no increase in reactor vessel water temperature

, will occur (even though COLD SHUT 00WN conditions are being maintained).

! INN With the RHR pump suction path aligned to the reactor pressure vesset for shutdown l cooling the RHR minimum flow valve may be doenergized in the closed position.

FERMI - UNii 2 3/4 9-17

{