ML20154A195

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Proposed Tech Spec Changes as Result of Recent Design Change to Allow Addition of Sprinklers to Area IA424 to Add More Accessible Containment Isolation Valve E12-F394. W/Significant Hazards Consideration
ML20154A195
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 02/28/1986
From:
MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML20154A172 List:
References
TAC-60863, TAC-60864, NUDOCS 8603030332
Download: ML20154A195 (5)
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Text

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TA8LE 3.6.4-1 CONTAINMENT AND ORYWELL I5OLATION VALVES '

MAXImm SYSTEM AND PENETRATION ISOLATION TIME VALVE NUMBER NUMBER VALVE GROUP I ") (Seconds)

1. Automatic Isolation Valves #
a. Containment i Main Steam Lines B21-F028A 5(0)* 1 . 5 i Main Steam Lines 821-F022A 5(I)* 1 5
Main Steam Lines 821-F067A-A 5(0)* 1 9

) Main Steam Lines 321-F0288 6(0)* 1 5

) Main Steam Lines 521-F0228 6(I)* 1 5 j Main Steam Lines 521-F0678-A 6(0)* 1 9

! Main Steam Lines . 821-F028C 7(0)* 1 5

Main Steam Lines 821-F022C 7(I)* 1 5

, Main Steam Lines 321-F067C-A 7(0)* 1 9 l'

Main Steam Lines 821-F0280 8(0)* 1 5 Main Steam Lines 821-F022D 8(I)* 1 5

Main Steam Lines 821-F067D-A 8(0)* 1 9

! RHR Reactor E12-F008-A 14(0) 3 40 Shutdown Cooling i

Suction i RHR Reactor E12-F009-B 14(I) 3 40 l Shutdown Cooling Suction Steam Supply to E51-F063-B 17(I) , 4 - 20

, RHR and RCIC Turbine i

Steam Supply to E51-F064-A 17(0) 4 20 RHR and RCIC Turbine ..

I Steam Supply to E51-F076-8 17(I) 4 20

! RHR and RCIC Turbine RHR to Head Spray E12-F023-A 18(0) 3 O 94 RHR to Head Spray E12-F394-8 18(I) 3 l+- 8 l (a) See Specification 3.3.2, Table 3.3.2-1, for isolation signal (s) that

operates each valve group.

(b) Deleted

} (c) Hydrostatically tested with water to 1.10 P 4

(d) HydrostaticallytestedbypressurizingsystIm,12.65psig. to 1.10 P (e) Hydrostatically tested during system functional tests. ,, 12.65 psig.

(f) Deleted

! (g) Normally closed or locked closed manual valves may be opened on an ,

! intermittent basis under administrative control.  !

*The provisions of Specification 4.0.4 are not appitcable for entry into '

OPERATIONAL CONDIT0NS 2 or 3 provided the surveillance is performed within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after reaching a reactor steam pressure of 600 psig and prior to entr into OPERATIONAL CONDITION 1.

  1. The {-A, -8, -C, -(A), -(8), -(C)" designators on the valve numbers indicate associated electrical divisions. .

.......... . . . . . . . . . - . ... . ....... ..- .. - - ..... . ..... , - m ti;; ::: t;;t hg. O., s.; ired ;M e; O thie che..e Ob; . Mil M :iitt;d t th E xt :t;; d tth "O d:,: Of th: m: f ci:=; if= 2:t r-detter.

l GRAND GULF-UNIT 1 3/4 6-30 Amenhnt No. 7, l

' e603030332 B60229 ,

PDR ADOCK 05000416

, a a

2. (NPE-86/01)

SUBJECT:

Technical Specification 3.7.6.2.b page 3/4 7-20 DISCUSSION: The proposed technical specification change results from a design change to install a wet pipe automatic sprinkler i system in fire zones 1A424, 1A417, and 1A428 elevation 166' - 0" of the auxiliary building. This sprinkler system will be designed and installed in accordance with NFPA 13, 1980 edition.

This design change is scheduled for implementation prior to the first refueling outage. MP&L requests NRC review and concurrence by June 1, 1986 in order to allow flexibility in the design change schedule before the first refueling outage. As done on several recent Technical Specification changes involving design changes to the plant, it is requested that the NRC issue the change with an open effective date and require that MP&L notify the NRC within 30 days of the effective date of implementation of the affected technical specification changes.

1 JUSTIFICATION: The setdown area (Fire Zone IA424) will be used to store combustibles during refueling operations. This creates a potential for a fire during refueling that could damage cables associated with Division 11 safe shutdown components. Fire Zone IA424 is located west of Fire Zone

1A417 and North of Fire Zone IA428. Both Fire Zones IA417 and 1A428 contain Division I and II safe shutdown components and are separated from each other by Fire Zone 1A424. With the potential to store high volumes of combustibles in Fire Zone IA424 during refueling, a postulated fire originating in this area could affect, or propagate to affect more than one train of safe shutdown.

This area contains no redundant safe shutdown-related raceways but does contain safety-related cable.e Fire protection features consisting of ionization smoke detectors, accessibility to manual hose streams, and portable fire extinguishers are provided for this area. The ionization smoke detection system alarms both locally and in the control room assuring prompt notification of plant personnel.

Following discussions with the NRC staff, MP&L committed in a [[letter::AECM-82-324, Forwards Proposed Revisions to FSAR Section 9.5 & App 9A Clarifying Presentation of Fire Protection Program,In Response to Outstanding Items 1(a) & 1(b) Identified in License NPF-13.Info to Be Incorporated Into Next FSAR Amend|July 16, 1982 letter]] to Mr. Harold R. Denton from L. F.

Dale to install automatic sprinkler coverage in Fire Zone IA424 prior to the commencement of the first regularly scheduled refueling outage. The proposed change is being submitted to satisfy the above commitment. Included with this change, is a drawing showing the area to be covered by the Sprinkler System, which will include coverage into areas IA417 and 1A428. 1 J12PMI86021701 - 2

r .

-}

. a SIGNIFICANT HAZARDS CONSIDERATION:

The design change associated with this proposed technical specification change will provide increased fire protection for area 1A424. Following installation, this change will reduce the potential for damage to electrical cables of safe shutdown systems.

The proposed change does not involve a significant increase in the probability or consequencts of an accident previously evaluated because it adds improvements not currently listed in the technical specifications. The potential or probability of fire damage to electrical cables of safe shutdown systems in the adjacent areas to 1A424 will be reduced by this proposed change and thus will further mitigate consequences of a fire related accident initiating from this area.

The proposed change does not create the possibility of a new or different kind of accident from any accident previously evaluated. This change is being proposed to .

reduce the possible effects of fire related accidents and does not create the possibility of any new or different kind of accident from those presently analyzed. The piping meets all applicable code requirements. The supports have been seismically analyzed for II/I concerns. No new failure modes are created.

The proposed change does not involve a significant reduction in the margin of safety because with the addition of the sprinkler system, the margin of safety involving fire protection of cables associated eith Division II is increased.

In its guidance on applying the criteria of 10CFR50.92(c),

the Commission stated that amendments adding requirements not listed in the technical specifications, would not involve s12 nificant hazards consideration. [48 FED. REG.

14864, 14870 (1983)] The proposed change falls int- this category and therefore involves no significant hazards consideration.

J12pMI86021701 - 3

PLANT SYSTEMS SPRAY AND/0R SPRINKLER SYSTEMS LIMITING CONDITION FOR OPERATION 3.7.6.2 The [ollowing spray / sprinkler systems shall be OPERABLE:

a. Diesel Generator Building
1. Diesel Generator A pre-action sprinkler system N1P64D142A Diesel Generator B pre-action sprinkler system N1P6401428 2.

Diesel Generator C pre-action sprinkler system N1P640142C 3.

b. Auxiliary Building
  • N1P64D150
1. Elevation 93'/103' Northeast Corridor N1P640151
2. Elevation 119' Northeast Corridor N1P640152
3. Elevation 139' Northeast Corridor N1P64D153
4. Elevation 166' Northeast Corridor Elevation 119' West Corridor N19640158 5.

Elevation 139' West Corridor N1P64D159 6.

7. Elemtion 166 Northwest Corridor 8

WiP6fD162. l

c. Control Building
  • Elevation 148' Lower Cable Room N1P64D154 1.

Elevation 189' Upper Cable Room N1P640155 2.

3. Elevation 93' NSP640140 Fire Pump House
  • NSP640136A/B d.

APPLICABILITY: Whenever equipment protected by the spray / sprinkler systems is required to be OPERABLE.

ACTION:

a. With one or more of the above required spray and/or sprinkler systems inoperable, within one hour establish a continuous fire watch with backup fire suppression equipment for those areas in which redundant systems or components could be damaged; for other areas, establish an hourly fire watch patrol.
b. The provisions of Specification 3.0.3 and 3.0.4 are not applicable.

SilRVEILLANCE REQUIREMENTS 4.7.6.2 The above required spray and sprinkler systems shall be demonstrated OPERABLE:

a. At least once per 31 days by verifying that each valve, manual, power operated or automatic, in the flow path is in its correct position.

" Wet pipe sprinkler system.

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