ML20112J631
| ML20112J631 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/01/1985 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20112J625 | List: |
| References | |
| TAC-57340, TAC-57341, NUDOCS 8504050247 | |
| Download: ML20112J631 (5) | |
Text
8 ATTACHMENT I PROPOSED TECHNICAL SPECIFICATION REVISION 8504050247 850401 PDR ADOCK 05000369 P
-. ~.. - -.... - -
_ - = _.. - -
t PLANT SYSTEMS i
3/4.7.10 FIRE SUPPRESSION SYSTEMS FIRE SUPPRESSION WATER SYSTEM i
1 LIMITING CONDITION FOR OPERATION 4
3.7.10.1 The-Fire Suppression Water System shall be OPERABLE with:
a.
At least two fire suppression pumps, (either A and C orb and C) each with a capacity of 2500 gpm, with their discharge aligned to the fire suppression header; and b.
An OPERABLE flow path capable of taking suction from Lake Norman and I
transferring the water through distribution piping with OPEPABLE sectionalizing control or isolation valves to the yard hydrant curb valves, the last valve ahead of the water flow alarm device on each sprinkler or hose standpipe, and the last valve ahead of the deluge l
i valve on each Deluge or Spray System required to be OPERABLE per l
Specifications 3.7.10.2 and 3.7.10.4.
)
APPLICABILITY: At all times.
i 1
ACTION I
i With one of the above required pumps.and/or one water supply inoperable, l
i a.
l restore the inoperable equipment to OPERABLE status within 7 days or provide an alternate backup pump or supply.
l b.
With the Fire Suppression Water System otherwise inoperable establish j
a backup Fire Suppression Water System within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
i c.
The provisions of Specifications 3.0.3 and 3.0.4 are not applicable.
I i
l 1
4 4
i I
I r
I e
McGUIRE - UNITS 1 and 2 3/4 7-32 i
PLANT SYSTEMS a
i 4
BASES SNUB 8ERS (Continued)
The service life of a snubber is established via manufacturer input and information through consideration of the snubber service conditions and j
associated installation and maintenance records (newly installed snubber, seal replaced, spring replaced, in high radiation area, in high temperature area, i
etc...).
The requirement to monitor the snubber service life is included to l
ensure that the snubbers periodically undergo a performance evaluation in view j
of their age and operating conditions., These records will provide statistical l
bases for future consideration of snubber service life.
The requirements j
i for the maintenance of records and the snubber service life review not j
intended to affect plant operation.
i
)
3/4.7.9 SEALED SOURCE CONTAMINATION i
1 The limitations on removable contamination for sources requiring leak l
testing, including alpha emitters, is based on 10 CFR 70.39(c) limits for
{
This limitation will ensure that leakage from Byproduct,. Source, and Special Nuclear Material sources will not exceed allowable intake values, j
Sealed sources are classified into three groups according to their use, i
with Surveillance Requirements commensurate with the probability of damage to a source in that group.
Those sources which are frequently handled are required 1
to be tested more of ten than those which are not.
Sealed sources which are continuously enclosed within a shielded mechanism (i.e., sealed sources within radiation monitoring or boron measuring devices) are considered to be stored t
and need not be tested unless they are removed from the shielded mechanism.
i 1
(
l 3/4.7.10 FIRE SUPPRESSION SYSTEMS 1
The OPERABILITY of the Fire Suppression Systems ensures that adequate fire suppression capability is available to confine and extinguish fires 3
{
occurring in any portion of the facility where safety-related equipment is located.
i The Fire Suppression System consists of the water system, spray, l
and/or sprinklers, Halon, and fire hose stations.
The collective capability of the Fire Suppression Systems is adequate to minimize potential damage to safety related equipment and is a major element in the facility fire protection I
program.
1 In the event that portions of the Fire Suppression Systems are inoperable, i
alternate backup fire-fighting equipment is required to be made available in the affected areas until the inoperable equipment is restored to service.
When the inoperable fire-fighting equipment is intended for use as a backup means of fire suppression, a longer period of time is allowed to provide an alternate means of fire fighting than if the inoperable equipment is the primary means of' fire suppression. For McGuire Nuclear Station pumps A and B serve as a backup for each other. Pump C is located separately with independent dedicated power supply.
McGUIRE - UNITS 1 and 2 8 3/4 7-6
=
ATTACHMENT II Justification and Safety Analysis The proposed changes to the Technical Specifications are being made to alleviate NRC concerns discussed during the NRC Region II, Fire Protection Audit meeting held in September 1984.
The current Technical Specification 3.10.7.1 requires that at least two of the fire Suppression pumps (pump A, B or C) be operable and allows any one of the three pumps to be indefinitely inoperable.
Fire Suppression pumps i
A, B and C are powered by the Unit 2 switchgear (2TB), Unit 1 switchgear (lTD) and the dedicated 44 Kilovolt substation, respectively. The 44 Kilovolt substation is independent of the McGuire Station Auxiliary Power System.
NRC Region II expressed concern regarding the remote possibility of a fire causing the loss of offsite power to pumps A and B simultaneously with an inopera' ale pump C.
In this unlikely scenario a total loss of Fire Suppression j
Water System would occur.
i The proposed amendment of the Technical Specification 3.10.7.1 would require that either pumps A and C or pumps B and C be operable at all times.
The proposed changes would no longer permit an indefinite inoperability of the C pump.
Pump C is separated from pumps A and B and is also provided with an independent power source. Pumps A and B serve as back ups for each other as they are powered from the main switchyard.
There'is no installed backup for j
pump Cwith a power supply independent of the main switchyard. This arrangement meets all 10CFR50, Appendix R requirements for the Fire Suppression Water System as well as adequately addresses the concerns raised in the NRC, Region II Fire Protection Audit meeting.
i 1
l i
4 1
i i
l i
r
.o ATTACHMENT III Analysis of Significant Hazards Consideration Pursuant to the requirements of 10CFR50.91, this analysis provides a determination that the proposed modification of the Technical Specifications does not involve a significant hazards consideration, as defined by 10CFR50.92.
The proposed amendment of the Technical Specifications are more restrictive that the current Specification 3.7.10.1.
The proposed changes require the operability of either the A or B fire suppression pumps as well as the C pump at all times to eliminate the remote possibility of a total loss of Fire Suppression Water System during a concurrent loss of offsite power with a plant fire.
The proposed amendment would not:
1)
Involve a significant increase in the probability or consequences of an accident previously evaluated; or
- 2) Create the possibility of a new or different kind of accident from any accident previously evaluated; or 3)
Involve a significant reduction in a margin of safety.
Based upon the preceding analysis, Duke Power Company concludes that the proposed amendments do not involve a significant hazard consideration.
a
$