ML20032A775
| ML20032A775 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 10/27/1981 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML20032A769 | List: |
| References | |
| NU1081-0017C142, NU1081-17C142, NUDOCS 8111020366 | |
| Download: ML20032A775 (4) | |
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PROPOSED TECHNICAL SPECIFICATION PAGE CHANGES Big Rock Point Plant i
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l Limitine Conditions for Operation Su rve i l l ance Reeu t rement 11.3.5.3 EMERGENCY POWER SOURCES (Contdl 11.4.5.3 EMERGEVOY POWED SOURCES (Contd) 3.
The diesel generator fuel supply shall (4) Overspeed tripping, be adequate for three-day operation.
(5) Ba tte ry unde rvol tage a la re.
1 i
4.
If Specifications A.2 or A.3 are not met, a normal orderly shutdown shelf (c) Verify the automatic transfer of be initiated within one (1) hour and station power f rom the 138 FV the reactor shall be shut down as line to the 46 kV line, described in Section 1.2.5(a) within twelve (12) hours and shut down as (d) Verify the automatic transfer of i
desc ri bed in Section 1.2.5(a) and (b) power sources for the 1Y and 2Y within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Du ring instrument and control panels, i
refueling operations cease all changes which could arrect react ivi ty.
(e) Verify the cells, cell plates, and battery racks show no visual i
5.
The station battery system shall be indication of physical damage or operable under all conditions except abnormal deterioration for the during cold shutdown.
If the station station bettery and the RDS bat-battery is inoperable, no actions shall te ries, e
be taken which result in a reactivity addition, except cooldown, or which (f) Ve ri fy the ce l l-to-ce l l a nd te r-might result in the primary coolant minal connections are clean, tight, system being dra ined, free or corrosion and coated with anti-corrosion material for the sta-6.
If specification A.5 is not met a tion battery and the RDS batteries.
normal orderly shutdown of the reactor 1
shall be initiated within one (1) hour (g) Verify that the battery charger for and the reactor shall be shut down as the station battery and the RDS bat-3 described in Section 1.2.5(a) within turies will supply at least 30 amperes twelve (12) hours and shut down as at a minimum of 135 volts for at least described in Section 1.2.5(a) and (b) 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
7.
One RDS uninterruptible power supply tion battery and the RDS batteries is including battery may be out of service adequate to supply and maintain in 4
as described in Section 3.1.5 Action 3.
OPERA 8LE status all of the actual 4
emergency loads for the design time interval when the battery is sub-Jected to a battery service test.
The design time interval for the RDS batteries is one hour and eight hours for the station battery.
(1) Test and calibrate tr.e 2400 volt bus undervoltage trip control components as follows; i
4 (1) The undervoltage relays 127-10KY, 1
XZ a nd YZ wi l l d rop out on decreasing voltage of no lower than 107.1 vo l ts, a f te r a delay of <.6 seconds.
(2) The auxiliary timing relay 162-104 wi l l be actua ted a f te r a i
10 i O.5 second time delay upon i
receiving a signal from all th ree ( 3 ) unde rvo l tage re lays, j
nuo581-0357d-43-13 147 P roposed e
Limitina Conditions for Operation Su rve i l l ance Reau i rement 11.3.5.3 EMERGENCY POWER SOURCES (Contd) 11.4.5.3 EMERGENCY POWER SOURCES (Contd) 8.
During reactor power operation, the 2.
Monthly -
138 kV line may be out of service for i
repair for periods up to three (3)
(a) Test start diesel generator and days.
operate at least the fire pump as a load to 480 V Bus 2B for at least 20 minutes, 9.
If Specification A.8 is not met, a normal orderly shutdown shall be ini-tlated within one (1) hour and the (b) Verify that the cell voltage is reactor shall be shut down as described 22.0 volts and specific gravity is in Section 1.2.5(a) within twelve (12) 11.2 of each cell of the station hours and shut down as described in battery; and verify that the cell Section 1.2.5(a) and (b) within the voltage is 26.0 volts and specific following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, gravity is 21.2 on each cell of the RDS batteries.
B.
During power and refueling operations, the 2400 volt bus undervoltage components shall be (c) Test operate the rod position motor operable or placed in the tripped condition, genera tor set.
except during the monthly channel functional e
testing period.
(d) Perform a channel functional test of the 2400 volt bus undervoltage trip system.
3.
Weekly -
(a) The electrolyte level of each RDS battery pilot cell and the station battery pilot cell is between the Linimum and maximum level Indication marks.
(b) The pilot cell specific gravity for RDS and station batteries corrected to (77)*F, is 11.2.
(c) The station battery pilot celi voltage is 22.0 volts. The RDS battery pilot cell voltage is 16.0 volts.
(d) The overall battery voltage is 2125 volts for the station battery and the RDS batteries.
(e) Test start the diesel generator and run for wa rm-up period.
nuO481-0127b-43 148 P roposed
I Ba ses:
No rma l station power can be provided by the station turbine generator, the 138 kV transmission line or the 46 kV line. These sources are adequate to provide emergency a-c power. When none or these sources is available, a single emergency diesel generator rated at 20C kW starts automatically to provide emergency a-c power to 480 V Bus 28.
The weekly starting test is based on Manufacturer's Bulletin 33743-1 for relubrication protection of moving parts. Diesel generator initiation and output circuit breaker closure is accomplished by two voltage sensors: One to detect loss of norma l power on Bus 28; and, the other to provide assurance or generator output prior to automatic closure of the generator output breaker. Additional b rea ke r interlocks are provided to assure that the no rma l Buses 1 A and 2A are isolated prior to clnsing the generator output breaker.
This prevents overloading of the generator during the switching period. An undervoltage trip at $89.25% of normal voltage Isolates the 2400 volt bus prior to any postulated equipment degradation.
The operability of the diesel battery and charger is verified by the weekly starting test of the diesel and by the weekly verification of the electrolyte level and overall battery voltage.
The diesel fuel oil tank is sized for ten-day full-load operation. Three-day supply is considered adequate to provide fuel makeup.
A single station battery supplies power for normal station services and is sized for emergency uses including valves and con-trols of Loss of Coolant Accidents. The battery can be charged from the emergency diesel generator output i f no rma l station power sources are not available.
The primary core spray valves and the primary containment spray valve are operated and controlled by power f rom thi station ba t te ry.
The backup core spray valves and backup containment spray valve are operated by power from normal station power sources or the emergency diesel gene ra to r.
RDS uninterruptible power supplies (UPS) A, B, C, and D (each consisting or a battery, battery cha rger and an Inverter) supply ear 5 division (except division 5) with electrical power. Each UPS has outputs or 120 V a-c, 60 Hz, and 125 V d-c.
One or these batterles supplies control power for the emergency diesel generator. Divisions 1 & 2 and 3 & 4 normally receive power from 480 V a-c Buses 1A and 2A, re spec t ive ly.
In the event or loss of power to either or both buses, provision is included for supplying input power f rom 480 V a-c Bus 2B which is tied to the emergency diesel generator, if all 480 V a-c power is lost, the RDS UPS is capable or sustaining its outputs for one hour. The station battery has adequate capacity to carry normal loads plus an assumed failure (locked rotor current) of the d-c lube oil pump for 54 minutes without the battery charger and still provide sufficient power for equipment requi red to operate during a LOCA.
If steps are taken to reduce nonessential loads during a loss of off-site power (such as part of the emergency lights), additional time (cp to five hours) can be gained from the time of the loss of the charger untl1 the battery would no longer have sufficient power for equipment required to operate during a LOCA.
The station battery and the four (4) RDS batteries will be considered operable if they are essentially fully cha rged and the battery charger is in service. Additionally, prior to the startup following the 1977 refueling outage, suc-cessful completion or service testing and perrnraance discharge testing within each operating cycle and each sixty months, respectively, will further establish battery reliability.
nu0581-0357d-43-13 149 P roposed