ML20151Q246

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs Re Noninterruptible Control Air Sys
ML20151Q246
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 08/05/1988
From:
DETROIT EDISON CO.
To:
Shared Package
ML20151Q242 List:
References
NUDOCS 8808110084
Download: ML20151Q246 (14)
v • d • e


Text

. .

PROPOSED NEW SPECIFICATION 3/4.7.10 8808110084 880805 PDR ADOCK 05000341 P PDC

., -. - - . - - . . - - . . - _ . , _ - .. ---. ...-_.,=-----,--..., -. . - . - . - - .

1 1

l PLANT SYSTEMS 3/4.7.10 NONINTERRUPTIBLE CONTROL AIR SYSTEM LIMITING CONDITION FOR OPERATION 3.7.10 Two independent Noninterruptible Control Air (NIAS) system subsystems shall be OPERA 3LE with each subsystem :

a. Consisting of one OPERABLE Control Air Compressor, associated Dehydration and Filter Units Air Receiver Tank, and associated control instrumentation.
b. Capable of automatic isolation from nonsafety grade air systems.

APPLICABILITY: OPERATIONAL CONDITION 1, 2, 3, 4, 5, and *.

ACTION:

a. In OPERATIONAL CONDITION 1, 2, or 3:
1. With one NIAS system subsystem inoperable due to an inoperable Control Air Compressor, associated Dchydration or Filter Unit, or associated control instrumentation, cross-tie the NIAS system subsystem to the OPERABLE NIAS system subsystem within one hour. Restore the inoperable NIAS system subsystem to OPERABLE status within 30 days or be in at least HOT SRUTDOWN 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 />.
2. With one NIAS system subsystem otherwise inoperable:
a. Verify that the NIAS system subsystems are not cross-tied within one hour,
b. Declare the af fected Accident Monitoring Instrumentation (Drywell Hydrogen and Oxygen concentration Drywell pressure, and Suppression Chamber pressure and water level), Primary Containment Atmosphere Gaseous Radioactivity monitor (Division I only), MSIV Leakage Control System subsystem Torus to Secondary Containment vacuum breaker icolation valve, Standby Gas
  • When irradiated fuel is being handled in the secondary containment, during CORE ALTERATIONS, and during operations with the potential for draining the reactor vessel.

Treatment System subsystem, and Control Room Emergency Filtration System components it. operable and take the ACTIONS required by Specificaticus 3.3.7.5, 3.6.2.1, 3.4.3.1, 3.6.1.4, 3.6.3, 3.6.5.3, and 3.7.2.

3. With both NIAS system subsystems inoperable, be in at least HOT 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 SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,
b. In OPERATIONAL CONDITION 4, 5 or  :
1. With one NIAS system subsystem inoperable due to an inoperable Control Air Compressor, associated Dehydration or Filter Unit, or associated control instrumentation, cross-tie the NIAS system subsystem to the OPERABLE NIAS system subsystem within one hour.
2. Otherwise, declare the Standby Gas Treatment subsystem (s) and Control Room Emergency Filtration System component (s) associated with the inoperable NIAS system subsystem (s) inoperable and take the ACTIONS required by Specifications 3.6.5.3 and 3.7.2.

SURVEILLANCE REQUIREMENTS 4.7.10.1 The Noninterruptible Control Air System shall be demonstrated OPERABLE:

a. At least once per 31 days by verifying that the cross-tie valves and each valve (manual, power-operated or automatic) required for proper operation of the Control Air Compressors, Filter and Dehydration Units, and associated control instrumentation that is not locked, sealed, or otherwise secured in position, is in its correct position.
b. At least once per 18 months by verifying that each automatic valve which isolates the NIAS system subsystem from nonsafety grade air systems actuates to its isolation position on each of the following automatic actuation test signals:
1. Station Air Supply low pressure
  • When irradiated fuel is being handled in the secondary containment, during CORE ALTERATIONS, and during operations with the potential for draining the reactor vessel.
2. NIAS Control Air header low pressure
3. Loss of offsite power
c. At least once per 18 months by verifying the control air compressor capacity is greater than or equal to 100 scfm.
d. At least once per 18 months by verifying that each Control Air Compressor automatically starts on each of the following automatic actuation test signals e

1.- NIAS Control Air Header low pressure.-

2. Loss of Coolant Accident (Drywell Pressure-High and/or Reactor Vessel Level-Low Level 2).
3. Emergency Diesel Generator load sequencer following loss of power. i L

4 h

T 1

a l

1

a. e.. - -wa,s..K;- +ma,ma-,m 2.,. ,,m;_ m .em,o z p-, 6 o J, ,,s.s,4nwum. e2 1,s-. san,,.a ,s,g,ae,awman .-,e -.m2meoeaw-,6m a2--.a s- - -a m 9

i i

1 4

t j i

PROPOSED BASES 4

t A

i I

k 4

1 i

I i

1 t 1

]

3 I

i d

i I

O t

?

5

}

.--an=-,--,-_. ~ ... .. ,, -o mm .

l i

3/4.7 PLANT SYSTEMS BASES 3/4.7.10 NONINTERRUPTIBLE CONTROL AIR SYSTEM The OPEPABILITY of the noninterruptible control. air system, which ,

provides a safety grade back up control air ' source, is required to support the operation of safety-related equipment during normal and accident conditions. If a Control Air Compressor, Dehydration / Filter Unit or associated control instrumentation becomes inoperable, the two subsystems can be cross-tied and the control air requirements satisfied by a single compressor. Since a safety grade back up control air supply is available, components utilizing the NIAS are not made inoperable from the ACTION of cross-tieing the two subsystems.

Studies using the Probabilistic Risk Assessment methodology have shown that cross-tieing the NIAS subcystems poses a smaller risk than operation with no safety grade back up control air for one division.

If a noninterruptible control air system subsystem becomes otherwise inoperable, the NIAS subsystem cross-tie must be closed to assure OPERABILITY of the remaining NIAS subsystem and the associated safety-related equipment. The ACTIONS specified in this situation -

carry out the ACTIONS for the resulting inoperabilities due tr. the loss of control air to equipment or instrument isolation valves.

I

' c

  • 4 e

PROPOSED PAGE CHANGES TO EXISTING TECHNICAL SPECIFICATIONS l

l I

l l

i I

l

PLANT SYSTEMS

( EMERGENCY EQUIPMENT COOLING WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.2 Two independent emergency equipment cooling water (EECW) system subsystems shall be OPERABLE with each subsystem comprised of:

a. One OPERABLE EECW pump, and
b. An OPERABLE flow path capable of removing heat from the associated safety-related equipment.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5.

, ' , , ACTION:

e. With an emergency equipment cooling water system subsystem inoperable, restore the inoperable subsystem to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUTOOWN 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 4 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and declare the asscciated safety-related equipment inoperable and-take the ACTION required by Specifications 3.4.9.1, 3.4.9.2, 3.5.1, 3.5.2, 3.6.2.2, 3.6.2.3,y .9.11.1, 3 and 3.9.11.2, as app 1'icable.

3.~7a /O SURVEILLANCE REQUIREMENTS 4.7.1.2 The emergency equipment cooling water system shall be demonstrated OPERACLE:

a. At least once per 31 days by verifying that each valve (manual, power-operated, or automatic) servicing safety-related equipment that is not locked, sealed, or otherwise secured in position, is in its correct position.
b. /.t least once per 18 months during shutdown, by verifying that each  !

automatic valve servicing nonsafety-related equipment actuates to 1 its isolation position and the associated EECW punp automatically starts on an automatic actuation test signal.

k FERMI - UNIT 2 3/4 7-3

PLANT SYSTEMS EMERGENCY EQUIPMENT SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.3 Two independent emergency equipment service water (EESW) system subsystems shall be OPERABLE with each subsystem comprised of:

a. One OPERABLE emergency equipment service water pump, and l
b. An OPERABLE flow path capable of taking suction from the associated '

ultimate heat sink and transferring the water through the associated EECW heat exchanger.

_ _ APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5. -

e ACTION:

With an emergency equipment service water system subsystem inoperable, restore  :

' the inoperabl~e subsystem to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 SHUTOOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and declare the associated safety-related equipment inoperable and take the ACTION required by Specifications 3.4.9.1, 3.4.9.2, 3.5.1, 3.5.2, 3.6.2.2, 3.6.2.3,y3.9.11.1, and 3.9.11.2, as applicable. ,

3 7,to, SURVEILLANCE REQUIREMENTS 4.7.1.3 The emergency equipsent service water system shall be demonstrated I OPERABLE:

a. At least once per 31 days by verifying that each valve (manual, power-operated, or automatic) servicing safety-related equipment that is not locked, sealed, or otherwise secured in position, is in its correct position.
b. At least once per 18 months during shutdown, by verifying the EESW pump automatically starts upon receipt of an actuation test signal, l i

l l

k i FERMI - UNIT 2 3/4 7-4

PLANT SYSTEMS .

ULTIMATE HEAT SINK LIMITING CONDITION FOR OPERATION

~

3.7.1.5 Two independent residual heat removal (RHR) reservoirs shal1 be OPERABLE with each reservoir comprised of:

a. A minimum water volume of 2,990,000 gallons, equivalent to an indicated water level of 25 feet (580 feet elevation).
b. At least one OPERABLE cooling tower with two cooling fans.
c. A maximum average water temperature of less than or equal to 80 F.

- d. A minimum average water temperature of greater than or equal to

_ _ _ 41 F.

er APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4, 5 and *.

ACTION: ,

With the requirements of Specification 3.7.1.5.a. b, or c not satisfied:

a. For one reservoir, restore the inoperable reservoir to OPERABLE status

/ .

within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 /> and declare the associated safety related equipment inoperable and take the ACTION required by Specifications 3.4.9.1, 3.4.9.2, 3.5.1, 3.5.2, 3.6.2.2, 3.6.2.3,p3.9.11.1 and 3.9.11.2, as applicable, 2 , 7 10,

b. For both reservoirs:
1. In OPERATIONAL CONDITIONS 1, 2 or 3, be in at least HOT 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 SHUTDOWN within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
2. In OPERATIONAL CONDITIONS 4 or 5, declare the RHRSW system, the EECW system, the EESW system and the emergency diesel generators inoperable and take the ACTION required by Specifications 3.7.1.1, 3.7.1.2, 3.7.1.3 and 3.8.1.2.
3. In Operational Condition *, declare the emergency diesel generators inoperable and take the ACTION required by Specification 3.8.1.2.

The provisions of Specification 3.0.3 are not applicable.

With the requirements of Specification 3.7.1.5.d for one or both reservoirs.

not satisfied, perform a visual inspection of the reservoir (s) at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to verify that no ice has formed. If ice is observed, demonstrate the OPERABILITY of each safety related pump in the reservoir (s) by running each safety related pump at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

\

FERMI - UNIT 2 3/4 7-6

5 4 9

CHANGES TO TECHNICAL SPECIFICATIONS PROPOSED IN REFERENCE 2

i

. - l 1

i ptANT SYSTEMS

- EMERGENCY EQU1PMtW1 COOLING WATER SYSTEM LIMITING CONDITION FOR OPERATION -

3.7.1.2 Two independent emergency equipment cooling water (EECW) system subsystees shall be OPERABLE gith each subsystem comprised of:

3. One OPERABLE EECW pump, and
b. An OPERABLE flow path capable of removing heat from the associated safety-related equipment.

OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5.

APPLICABIL11Y:

- - ACTION:

^;;...... ..y...., ,,. c.... ../lm,

..., .,..........,......:...r.../.......

I8P M. O  :...r...L., ..L.,."..... .. Or;;'.;;; ...;.. .:...,,7; ;..... .. ".. .. .. ..... i j

telna gi LJ 7 ;;C ., ; .. . . . . . . .. ,,. . . ;j ... . . . . . ..'5", ,,T j;;; LJT ;^ 2 ' . . . ; . . .. .. , /. }

~2' '" rr'--': ::

' r' ' " ' " " '. "3 !"P r s, *.< s, IgsteT P "" " ? "Y ~. "" p 'ry ' ' '-y: . '. "'~ "yi -r - : < :~ mn . -

:g,y; .-

s=:=.~". ......, ..,....., .... ........, _. ,,...__...

. f4

't SURVE1LLANCE REQUIREMENTS 4.7.1.2 The emergency equipment cooling water system shall be demonstrated OPERABLE:

a. At least once per 31 days by verifying that each valve (manual, power-operated, or automatic) servicing safety-relatec equipment that is not locked, sealed, or otherwise secured in position, is in its correct l

position.

b. At least once per 18 sonths during shutdown, by verifying that each automatic valve servicing nonsafety-related equipment actuates to .

its isolation position and the associated EECW pump automatically l starts on an automatic actuation test signal.

A.. rsae4.c

  • The. AQs es ..+ req., red .1. be opeut.Astg
  • 24a m Je p re ss en. as less 4 6 . .a esp.nl 4. 150 ps g.

FERH1 - UNIT 2 3/4 7-3

, _ . , _ - , . , . . . _ , . _ . . _ . , _ , . - . _ _ . . , - - , . _ _ _ ,__,.._._ ,,. ,.- .,__ _ ,,_ _ , ,,. ,_ _ - -.. _,c_...__.n.

. . j W (PAGE 3/d *1-31

' ('

ACTION:

a. With one EECW system subsystem inoperable. l
1. Declare the associated safety-related agalpment inoperable and,
2. Within 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />s:

a) verify ADS

  • la TEMBLE, and b) verify all regaired systems, subeystens, trains, cceponents and devices that depend on the remaining l

- TERABLE EECW system subsystem are also TERABLE. l l

Otherwise, take the ACTION reglired by Specifications ]

e -

3.4.9.1, 3.4.9.2, 3.5.1, 3.5.2, 3.6.2.2, 3.6.2.3, 3.*7./Oj ,

l 3.9.11.1, and 3.9.11.2, as applicable for each inoperable * '

.' safety-related agaipment. -

3. Restore the inoperable EECW system subsystem to TEmBLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least im SIUltOH 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 CMD SHtHDOWN within the

'b following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

I I

l d

1

( )

l J

l

1 4

"" $FTERC00LER YAFTERC00LER TAFTERC00LER RJ M l ) l l l df 1

! l .

at "" a. - 2: ==_

W. STATION S. CONTROL N. CONTROL AIR COMPRESSOR AIR COMPRESSOR AIR COMPRESSOR DIV.II DIV.I MM

  • -M- @-1: DEHYDRATION

.. s UNIT DIV.I 4 /

STATION I 29

- AIR , @-1:

RECEIVER M'g

'I DEHYDRATION UNIT DIV.II -

t AFTERC00LER 1 2:

R: x , ,

o Toca toca C. STATION AIR COMPRESSOR DEHYDRATION m m

UNIT 2

n m 1

.g. #

M axAs O

DIV II CONTROL STATION INTER U fIBLE AIR RECEIVER ""

AIR CONTROL 2: ,

RECEIVER RECEIVER

  • l
  • 2 a 2: DIV I CCNTROL '

l m,

T-m AIR RECEIVER TzLtOt toc =

1AFTERC00LER H4 X ma to statzow NIAS NIAS*

aza mmy sysm IAS DIV II DIV I USERS USERS USERS E. STATION AIR COMPRESSOR

'i DIAGRAM STATION & CONTROL AIR SYSTEM

- , - - - --. , - . , . , - - - - - - . , _ . - - -. - - - --- - - - - -

Retrieved from "https://kanterella.com/w/index.php?title=ML20151Q246&oldid=2965478"