ML20039B725

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Forwards Addl Info Re Fire Detection Sys & Pgcc Fire Detection for Facility,In Response to Questions Posed at 811210 Meeting.Info Includes Ionization Detection Sys, Water Spray Protection Sys & Diesel Fire Pumps
ML20039B725
Person / Time
Site: Clinton Constellation icon.png
Issue date: 12/14/1981
From: Geier J
ILLINOIS POWER CO.
To: John Miller
Office of Nuclear Reactor Regulation
References
L30-81(12-14)-6, U-0391, U-391, NUDOCS 8112230483
Download: ML20039B725 (8)


Text

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ILLINDIS POWER COMPANY y g{g L3 (3,_3gy_5 500 SOUTH 27TH STREET, DECATUR, ILLINOIS 62525 December 14, 1981 Mr. James R. Miller, Chief QfS N

Standardization & Special Projects Branch Division of Licensing 4 ,

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Office of Nuclear Reactor Regulation h .'; i, ~

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U.S. Nuclear Regulatory Commission Il-- g Washington, D.C. 205S5 Q gg,@o Se,

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Dear Mr. Miller:

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Clinton Power Station Unit 1 3 7;--p Docket No. 50-461 Ns Attached are details related to the Clinton fire detection system which were discussed with John Stang, Chemical Engineering Branch during a meeting on December 10, 1981. This item is considered by the NRC and IP to be confirmatory for CPS Licensing purposes.

Attachment s_

Clinton Fire Detection System PGCC Fire Detection (Verbal Question)

Sincerely, bLbM J. D. Geier Manager Nuclear Station Engineering ALR/lt cc: J. H. Williams , liRC Clinton Proj ect Manager H. H. Livermore, NRC Resident Inspector og J. Stang, NRC CEB $Os 1(

8112230483 DR ADOCK 811214 05000

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CLINTON FIRE DETECTION SYSTEM ,

. I. General Fire Protection Panel lH13-P840 serves as the central alarm panel for Sprinkler, CO , Halon, Ionization, Water Flow, DieselFirePump,andTarbineBuildingSmokeventportions of the Clinton Fire Detection System. This panel is located -

in the Main Control Room.

Devices located on this panel are a3 follows:

a. Fire Protection Annunciator Windows
b. Supplementary Initiation Pushbuttons for Pre-Action, Deluge, CO , and Halon Suppression Systems
c. Control Sw$tches and Indicating Lights.for Turbine Building Smoke Vents
d. Remote Start Pushbuttons for Diesel Fire Pumps
e. Supplementary Fire Indicating Lights for Individual Ionization Detector Zones The primary power source for the annunciator is the station non-Class lE 125V de system which has a four-hour battery backup following loss of offsite power as the secondary source. Dedicated circuits will be provided for manual connection to a Class lE power source within four-hours of loss of site power. This load is within the design limits of the Class lE power system.

The annunciator at this panel was not originally designed to monitor the integrity of incoming conductors. However, since the purpose of the fire protection program is to pro-tect safety-related systems and components against the hazards of fire,'it will be modified to monitor the intecrity of'the primary incoming fire alarm circuits from systems located in buildings containing safety-related equipment as follows:

a. Ionization Detection Panel (lPA09J) Common Fire Alarm
b. Division 1 - Cable Spreading Room Autc Pre-action System c.- Division 2 - Cable Spreading Room Auto Pre-action System
d. Division 1 - Diesel Generator Oil Storage Tank Room Wet Pipe System
e. Division 2 - Diesel Generator Oil Storage Tank Room Wet Pipe System
f. Division 3 - Diesel Generator Oil Storage Tank Room Wet Pipe System
g. Division 1 - Diesel Generator Day Tank Room Wet Pipe System
h. Division 2 - Diesel Generator Day Tank Room Wet Pipe System
1. Divinion 3 - Diesel Generator Day Tank Room Wet Pipe System
j. Fuel Building Railroad Bay Auto Pre-Action System i

l The performance requirements of Style 1 of Table 3-10.1 ,

oof NFPA-72D (1979) will be mat for those circuits monitored. E Interconnections of those systems to the annunciator are  !

shown on Figure 1.

A description of the elements of the Fire Detection / Protection system follows:

II. Ionization Detection System

-The ionization detection system consists of. detection zones throughout the plant as indicated in the fire hazards anal-ysis. Detectors are Pyrotronics Model DIS-5B with the excep-tion of the detectors in the Reactor Recirculation Pump-area which are thermal detectors. The power supply / alarm panel (lPA09J) for these detectors is located on Elevation 781'-0" in the Control Building. 120V power to this panel is provided by the Station Uninterruptible Power Supply (UPS) located in the same room. The primary power source.

for the UPS is the station.non-Class lE 480V ac power system, with a four-hour battery backup following loss of offsite power, as the secondary source. A dedicated circuit will be provided for manually connecting a Class lE source to this panel within four-hours of a loss of-offsite power.

This load is within the design limits of the Class lE power system.

The detector circuits are monitored for open or short cir-

-cuits as well as loss of power or undervoltage. Fire and trouble alarms for each dete-tor circuit are indicated at 1

IPA 09J; system fire and trouole alarms are indicated at lH13-P840. Supplementary fire indicating lights are pro-vided at lH13-P840 for identification of which fire zone is in the alarm state. System Fire and Trouble alarms will be arranged to provide redundant fire alarm receipt capa-

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bility as shown in Figure 2.

III. Water Spray Fire Protection Systems Each water spray fire protection system zone (deluge, pre-action, or wet pipe) has an individual local supervisory control panel. Thermal detectors, flow switches, manual pull stations, low-air pressure switches, gate valve position switches as applicable to each type cf system are connected to the local supervisory panels. Local fire bell alarms are provided for each panel. Circuit integrity for detectors, local pull stations and flow switches connected to the local

. supervisory panels is monitored (Class B, per NFPA 72D-1975).

Fire and trouble (combined for wet pipe systems) for each

, local supervisory panel are alarmed-at lH13-P840.. Fire and Trouble alarms for each system identified in I will be arranged to provide redundant fire alarm' receipt capa-bility as shown in Figure 2.

The primary power source for the local supervisory panels is the station non-Class 1E 125V de system,.which has a four-hour battery backup following loss of offsite power, as the secondary source. Dedicated circuits will be provided for manually connecting a class lE source to panels located in buildings which contain safety-related equipment within four hours of a loss of offsite power. This load is within the design limits of the Class lE power system.

IV. Diesel Fire Pumps Each of the diesel fire pumps is provided with a local con-trol panel (OFP0lPA and OFP0lPB) . A remote start pushbutton

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is provided at panel lH13-P840. The following alarms appear on both the local control panels and panel lH13-P840:

1) Failure to Start
2) Low Fuel Level
3) Auto Start / Engine Running The following alarms appear individually at each of the-local panels and are combined into a common " Trouble" alarm for each panel at Panel lH13-P840:
1) Engine Overspeed
2) Low Oil Pressure
3) High Water Temperature
4) Engine Failure
5) AC Failure
6) Battery 1 Failare
7) Battery 2 Failure
8) Control Switch in OFF Position The diesel fi;e pumps and controller panels are installed in accordance with.NFPA 20. The power supply to the con-troller is from the station non-Class lE 120V ac power system.

The diesel starting batteries provide in excess of a 24-hour capability for manual or automatic starting of the diesel fire pumps.

V. CO, Fire Protection Systems CO; fire protection is provided for each of the three sta-tion diesel generator rooms as well as for the main generator exciter bearing enclosure. A local control panel 1 COO 4J is provided for the exciter bearing enclosure. A common local control panel (lCOO5J) is provided for the three diesel generator room CO2 systems.

Fire and Trouble alarms, as well as a pushbutton for remote initiation for each of these systems are provided at Panel lH13-P840. Fire and Trouble alarms for the diesel generator rooms will be arranged to provide redundant fire alarm re-ceipt capatility as shown in Figure 2.

The following Trouble Alarms at the local control panel are combined into a Trouble Alarm at-lH13-P840:

i

1) Loss of Power
2) Alarm Supervisory

, 3) Solenoid Supervisory

4) Detector Supervisory
5) Lockout Valve Closed-
6) Manual Release Circuit Supervisory Local detection circuits are monitored for integrity (Class A per NFPA 72D 1975). The primary power source for the panels is the station non-Class lE 125V de system, which' has a four-hour battery backup following loss of offsite power as the secondary source. A dedicated circuit will be provided for manually connecting a Class 17 source to the control panel (lCOO 5J) for the diesel generator room CO 3 system. This load is within the design limits of the Class lE power system.

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VI. Standpipe Flow Switches Flow switches are provided in each of the standpipes as well as in the piping connections between the plant service '

water system and the fire protection system. Each of these switches is individually alarmed at lH13-P840.

VII. Turbine Building Smoke Vents Thirty-two smoke vents are provided in the roof-of the.tur-bine building. Each vent-has a fusible link trip as well as a solenoid release for manual opening. An alarm is pro-vided at lH13-P840 which indicates that one or more of the smoke vents is open. A supplementary indicating light is provided for each of six groups of smoke vents which indicates that one or more of the smoke vents in that group is open..

A control switch is also provided on 1H13-P840 to open.each group of smoke vents. The power supply is from the station.

non-Class lE 120V ac power system.

VIII. Halon Suppression System Halon suppression systems are provided in the QA Record Vault and the Telephone Equipment Room, both of which are located in- the service building.

Local control, monitoring of detector,. pull station and release solenoid circuit integrity (Class B per NFPA 72D-1975) is provided by a Pyrotronics " System 3" control panel.

Detectors are Pyrotronics Model DI-4A. Alarms will be pro-vided at lH13-P840 for-fire and trouble for there systems.

The power supply for these systems is from the station non-Class lE 120V ac system. A 24-hour battery backup is pro-vided for the QA Records Vault System.

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, . .. s FICURC 1 CLINTON POWER STATION - 11 NIT 1 ,

. CIRCUlf ARRA"GEMF.NT FOR ,

DETECTION AND SUPPRESSION SYSTEMS TCATED IN BUIIANGS CONTAININT SAFETY-RELATED EQUIPMENT , I To Diesel Generator 5 d From C0 7

Roome Storage Tank 120 py (1) - Style 1 Signaling Line Circuit

,o r p l (A) - Class A Electrical Supervision  :

Manual Connection to (B) - Class B Electrical Supervision 125 V de supply Class IE Source 4 Hour Battery Jackup }-

knual Connection to f, y Class 1E Source 4 Manuel Pushbuttoe 1.ocal lonization Local C0 Stations Detector Zone Controlhanel ( IN . I Control Panel

  • Thermal Detectors Ionization 7 (B) Electro-k nual '

Detsctors s

' ~ ~/ Pilot Cabinet l U-* (-(A) 1PA69J 1C005J '

5 3 .

B B

, Fire,Ala_rm/ Trouble _Circui,t,,(1) ,,,j l

! bME.*" 1 dI

  • S*'"l.3Dd".cpu,it {11,,_), Fire Protection Panel e in MCR

__Sys_t e.m. _Re_du_n.t_an_t _Fi_re_A_la_rm_C_ir_cu_it__ . ] ,

4.RedundantFireAlarmCircuit i

p - -Fire . .Alarm

. . . /_Ci.rcuit_(1)__

Trouble

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g _ .F.i.r.e A_la.rm._/Tr.o.u.b.le

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.C.i.rcuit. - - .1.)_ , _ _ - 3 3 l peu vu eum.csu a-_ -._.._ y <_.w. net u w.n.ae_mca_ _ _. _

l l l l 1H13-P840 l l g ,g y,, pgp, Local Fre-Actian Sprinkler Panet Sprinkler Panel -g 125 V DC Supply 4 Hour Battery Backup

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knual Connection To Class 1E Source

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Tae - 1 Detectors ?_)._)

h 'h I (9) -f f g l Manual Pull l l(B) e (g) [

f(B) .s (B) Station j(g) s 3 1 g***"' '

  • (B) {*J ,

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~TJ - - - "I Flow Switch ~ ,

Watir Supply Isolation Alara

) To Sprinklers To Sprinklerm {

Air Pressure Switch Deluge Isolation

$ Water Supply i Valve Cate Valve Cate Valve Check Valve n.

x -.. .. . - , . - _ __ _ _. ,

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.. . i FIGURE 2-CLINTON POWER STATION UNIT 1 ,

TYPICAL FIRE AND TROUBLE ALARM INDICATION FOR SUPPRESSION SYSTEMS LOCATED IN EUILDINGS CONTAINING SAFETY-RELATED EQUIPMENT l

Fire / Trouble Fire l l

Annunciator Window Annunciator Window i

g-_.---  ; r----- l 1 e l

i i i l l

' ' Control Room i *

- L- - - --- J ' - - --

O ire Alarm danel l ,

1H13-P840_ j

l. __ _ _ __ __ _ _ _ _ _ _- _ _

F = Fire Alarm Contact T = Trouble Contact R = End of Line Resistor a f " Circuit 2 Circuit 1 *

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- -! ocal L Panel I ' 7 ,I I

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Tf I l

1 F I I R L__ _

% ll __ _ _J Circuit 1 operation provides separate visual ~ indication of fire or trouble. Circuit 2 provides fire alarm receipt l-capability should there be an open circuit on Circuit 1.

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NRC Concern What indication is provided to the operator for a fire detected by the PGCC fire protection system.

Response

A fire bell, trouble horn, and indicating lights are provided ac each fire protection panel.