ML20126F698
| ML20126F698 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 12/18/1992 |
| From: | Gody A Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20126F701 | List: |
| References | |
| NUDOCS 9212310072 | |
| Download: ML20126F698 (4) | |
Text
3.
Each diesel generator shall be given an inspection, at least annually,* following the manufacturer's recommendations for this class of stand-by service.
4.
Each fuel oil transfer pump shall be run monthly.
The aoove tests will be considered satisfactory if all applicable equipment operates as designed.
B.
Safety-Related Station Batteries l
These surveillance specifications are applicable to all four safety-related stttion batteries: DOS, D06, D105, and D106; and the safety-related station swing battery D305.
1.
Every month the voltage of each cell (to the nearest 0.05 volt),
the specific gravity and temperature of a pilot cell in each battery and each battery voltage shall be measured and recorded.
2.
Every 3 months the specific gravity, the height of electrolyte, and the amount of water added, for each cell, and the temperature of every fif th cell, shall be measured and recorded.
3.
At each time data is recorded, new data shall be compared with old to detect signs of abuse or deterioration.
4.
Each Safety-Related Station Battery shall be demonstrated OPERABLE:
a.
At least once per 18 months (SERVICE TEST) by verifying that the battery capacity is adequate to supply and maintain in OPERABLE status all of the actual or simulated emergency loads for the design duty cycle.**
l b.
At least once per 60 months (PERFORMANCE TEST) by verifying l
that the battery capacity is at least 80% of the manufacturer's rating.
This performance discharge test may be performed in lieu of the battery service test.**
Annual performance discharge tests of battery capacity shall be c.
given to any battery that shows signs of degradation or has The surveillance interval for the 1992 annual inspection of diesel generator G02 may be extended up to 6 months, not to exceed a total time between annual inspections of 18 months.
- Service and Performance testing to begin subsequent to installation of the -
swing safety-related battery (D-305) which is expected by the er.d of 1992.
Unit 1 - Amendment No 2,170,135,136
(
Unit 2 - Amendment No. 2,113,J39,140 15.4.6-2 9212310072 921218 ADOCK0500g6 l
FDR P
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reached 85% of the service life expected for the application.
Degradation is indicated when the-battery capacity drops more than 10% of rated capacity from its previous performance test, or is below 90% of the manufacturer's rating. When performance tests are required, they may be perfonned in lieu of the battery service test.**
Basis The tests specified are designed to demonstrate that the diesel generators will provide power for operation of equipment. They also assure that the emergency generator system controls and the control systems for the safeguards equipment will function automatically in the event of a loss of all normal AC station 4
service power.
The testing frequency specified will be often enough to identify and correct any-mechanical or electrical deficiency before it can result in a system failure.
The fuel supply and starting circuits and controls are continuously monitored and any faults are alarm indicated. An abnormal condition in these systems would be signaled without having to place the diesel generators themselves on test.
Station batteries will deteriorate with time, but precipitous failure is extremely j
unlikely.
The surveillance specified is that which has been demonstrated.over the years to provide an indication of a cell becoming unserviceable long before it fails.
If a battery cell has deteriorated or if a connection is loose, the -
voltage under load will drop excessively indicating replacement or maintenance.
A Service Test, performed at least every 18 months, demonstrates adequate-battery capacity to supply power to loads required during the most demanding duty cycle.
-i This design duty cycle occurs upon an actuation of safeguards loads in one unit coincident with a loss of off-site power. The design duty cycle is defined further in FSAR, Section 8.2.
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A Performance Test will also be conducted at least every 60 months. The Perfonnance Test is a constant discharge rate capacity test which allows comparison with the manufacturer's rating of the battery. This test is the best indicator of the effects of aging on battery capacity.
Provisions are made in i
1
- Service and Performance testing to begin subsequent to installation of the swing safety-related battery (D-305) which is expected by the end of 1992.
Unit 1 - Amendment No.136 15.4.6-3 Unit 2 - Amendment No.140
.i O.
l these specifications to change the test periodicity to annual when.the battery is degraded or when the battery reaches that point in its service life at which capacity degradation with time is accelerated. Operability is satis-factorily demonstrated by achieving a capacity of at least 80% of the manufacturer's rating. Since the Performance Test entirely bounds the battery loads applied during a Service Test, when a Performance Test is conducted, the Service Test for that battery's current test cycle may be omitted.
These surveillance specifications are applicable to all five of the safety-related station batteries: DOS, D06 DIOS, D106, and the swing battery D305.
Reference FSAR, Section B.2 Unit 1 - Amendment No.136 15 4*6~4 Unit 2 - Amendment No.140
L A.2 Under abnormal conditions, one' reactor may be made critical providing tne following conditions are met:
a.
One 345 KV transmission line is in service; or the gas turbine is operating, b.
The 345/13.8 KV and the 13.8/4.16 KV station auxiliary transformers associated with the unit to be tuken critical are in service; or the associated 13.8/4.16 KV station auxiliary transfonner is in service and the gas turbine is operating, c.
Reactor power level is limited to 50% rated power until 2 or more transmission lines are restored to service, d.
4160 Volt buses A03 and A04 for the unit to be taken critical are energized from their normal supply.
e.
4160 Volt safeguards buses A05 and A06 for the unit to be taken critical are independently energized from their normal'or emergency power supply and both units' A05/A06 bus tie breakers are removed from their cubicles.
f.
480 Volt safeguards buses B03 and 804 for the unit to be taken critical are independently energized from their normal or emergency power supply and both units' B03/B04 bus tie breakers are open with control power removed, g.
A fuel supply of 11,000 gallons is available; and both diesel generators are operable.
h.
Four of the five safety related station batteries and all four of the main DC distribution systems are operable.
4 1.
Four battery chargers are operable with one charger carrying the DC loads of each main DC distribution bus:
D01, D02, D03 and 004.
I B.1 During power operation of one or both = reactors, the requirements of 15.3.7 A.1 may be modified to allow the following arrangements of systems and components:
If the 345 KV lines are reduced to only one, any operating reactor (s) a.
must be promptly reduced to, and limited to, 50% power.
If all 345 KV lines are lost, any operating reactor (s) will be reduced'to supplying its auxiliary load, until one or more 345 KV transmission lines are again available, b.
If both 345/13.8 KV auxiliary transfonners are out of service and only the gas turbine is operating, only one reactor will remain operating and it will be limited to 50% power. The second reactor will be placed in the hot shutdown condition.
Unit 1 - Arrendment No. 84,87,73#,136 Unit 2 - Amendment No. BB,92.J38,140 15.3.7-2 l
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