ML20041C538
| ML20041C538 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 02/26/1982 |
| From: | BOSTON EDISON CO. |
| To: | |
| Shared Package | |
| ML20041C537 | List: |
| References | |
| NUDOCS 8203020217 | |
| Download: ML20041C538 (7) | |
Text
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DO CM 00 PHPS TABLE 3.2.B (Cont'd) 8 i
INSTRUHENTATION TilAT INITIATES OR CONTROLS Tile CORE AND CONTAINHENT COOLING SYSTEHS m
bM CO ou TMM Hinimura i of
- E7 Operable Instrument Channels Per Trip System (1)
Trip Function Trip Level Setting Remarks Startup Transformer 3745V + 2% with 1.
Trips Startup Transformer Degraded Voltage Relays 9.2 + 0.5 sec.
to Emergency Bus Breaker.
j' time" delay ~
127A-504 2
Bus A5 i
1,2,3 &4 of Startup Transformer to Emergency Bus.
127A-604 2
Bus A6 1,2,3 & 4 3.
Initiates starting of Diesel Generators in conjunction with loss of auxiliary transformer.
4.
Prevents simultaneous start-ing of CSCS components.
5.
Starts load shedding logic for Diesel Operation in con-junction with (a) Low Imv g
Reactor Water Level and LowI i
Reactor Pressure or (b) liigh 8,
drywell pressure or (c) Core y
Standby Cooling System com-g ponents in service in con-y, junction with, Auxiliary o
. Transformer breaker open.
1
h PNPS TABLE 3.2.B.1 INSTRUMENTATION THAT MONITORS EMERGENCY BUS VOLTAGE
.I Minimum # of Operable Instrument Channels Per Trip System Function Sf'J nq Remarks Emergency 4160V Buses A5 3858 i 2% with Alerts Operator
& A6 Degraded Voltage 9.2 i 0.1 %
to possible degraded Annunciation Relays (1)
Second Time Delay voltage conditions 127A W 1
Bus A5 1&2 127A-A6 g
Bus A6 1&2 ii
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(.') In the event that the alarm system is determined inoperable, commence logging safety related bus voltand every 1/2 hour until such time as the alam is restored to operable
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- status, v.
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1 PNPS TABLE 4.2.5 MININUM TEST AND CALIBRATION FREQUENCY FOR CSCS l
Instrument Channel Instrument Functional Test Calibration Frequency Instrument Check
- 1) Reactor Water Level (1)
Once/3 months Once/ day
- 2) Drywell Pressure (1)
Once/3' months None 3)
Reactor Pressure (1)
Once/3': months None l
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- 4) Auto Sequencing Timers NA Once/ operating cycle None i
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Pressure Interlock (1)
Once/3 months None 6)
Start-up Transf. (4160V) a.
. Loss of Voltage Relays Monthly Once/ operating cycle None b.
Degraded Voltage Relays Monthly Once/ operating cycle None
- 7) Trip System Bus Power Monitors once/ operating cycle NA Once/ day 8)
Recirculation System d/p (1)
Once/3 months Once/ day
- 9) Core Spary Spar'ger d/p NA Once/ operating cycle Once/ day
(1)
Once/3 months None 11)
Steam Line High Temp. (HPCI & RCIC)
(1)
Once/3 months None k
- 12) Safeguards Area High Temp.
(1)
Once/3 mouths None E.
S
- 13) IIPCI and RCIC Steam Line Low Pressure (1)
Once/3 months None U
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- 14) IIPCI Suetion Tank Levels (1)
Once/3 months None 15)
Emergency 4160V Buses A5 & A6 Monthly Once/ Operating Cycle lNone Loss of Voltage Relays
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LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 1.
Verifying de-energization of the e=argency buses and load shedding from the e=ergency buses.
2.
Verifying the diesel starts from a=bient condition on the auto-start signal energizes the e=ergency, buses with per=anently connected loads, energizes the auto-connected e=ergency leads
,through the load sequence and operates for 3,5 =inutes while its generator is loaded with the e=ergency loadt The results shall be logged.
C.
Once per operating cycle with the diesel loaded per 4.9.A.1.b verify that on diesel generator trip see-ondary (off-site) a-c power is auto-matica11y connected within 12 to 14 seconds to the emergency service buses and emergency loads are energized through the load sequencer in the same manner as described in 4.9. A.1.b.l.
The results shall be logged.
A=end:ent No.
194A
.W 19.
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2.IMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.9.A Auxiliary Electrical Equipment 4.9.A Auxiliary Electrical Ecuip=ent Surveillance 4.
4160 volt buses A5 and A6 are ener-c.
Once a month the quantity of diesel gized and the associated 480 volt fuel available shall be logged.
buses are energized.
5.
d.
Once a month a sa=ple of diesel The station and switchyard 125 and fuel shall be checked for quality 250 volt batteries are operable.
in accordance with ASTM D270-I975.
Each battery shall have an operable The quality shall be within the battery charger.
acceptable li=its specified in Table 1 of ASTM D975-77 and legged.
6.
Emergency Bus Degraded Voltage 4
Annunciation System as specified 2.
Station and Switchyard Batteries in Table 3.2.B.1 is operable.
- a. Every week the specific gravity, the voltage and te=perature of the.
pilot cell and overall battery voltage shall be measured and legged.
- b. Every three months the mearureceats shall be made of voltage o. each cell to nearest 0.1 volt, specific gravity of each cell, and te=perature of every fifth cell. These =easurements shall be logged.
- c. Once each operating cycle, the stated batteries shall be subjected to a rated load discharge test.
The spe-cific gravity and voltage of each cell shall be deter =ined after the discharge and logged.
B.
Operation with Inoperable Equipment 3.
Emergency 4160V Buses A5-A6 Degraded Voltage Annunciation System.
k'henever the reactor is in Run Mode or startup Mode with the reactor not in a Cold Condition, the availability of electric power shall be a s specified
- a. Once each operating cycle, calibrate in 3.9.B.1, 3.9.B.2, 3.9.B.3, 3.9.B.4 the alarm sensor.
and 3.9.B.S.
- b. Once each 31 days perform a channel 1.
From and af ter the date that incoming functional test on the alarm system.
power is not availble from the start-up or shutdown transformer, continued
- c. In the event the al' arm system is deter =ined inoperable under 3.b above, co=sence logging safety related bus voltage every 30 =inutes until such time as the alarm is restored to operable status.
I A=endment No.
j 195
NMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.9.B Operation with Inoperable Equipment following conditions are s'arisfied and the AEC is notified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence and the plans for restoration of the inoperable co=ponents:
a.
The startup transormer and both offsite 345 kV trans=ission lines are available and capable of automati-cally supplying auxiliary power to the emergency 4160 volt buses.
b.
A transmission line and associated shutdown ' transformer are available
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and capable of automatically sup-plying auxiliary power to the a=ergency 4160 volt buses.
5.
From and after the date that one of the 125 or 250 volt battery systems is made or found to be inoperable for any reason, continaed reactor operation is permissible during the succeeding three days within electrical safety considerations, provided repair work is initiated in the most expeditious manner to return the failed component to an operable state, and Specification 3.5.F is satisfied. The AEC shall be notified within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the situation, the precautions to be e
taken during this period and the plans to return the failed component to an operable state.
6.
With the emergency bus voltage less than 3950 but above 3745 (excluding transients) during normal operation, transfer the safety related buses to the diesel generators. If grid voltage continues to degrade be in at least Hot Shutdown within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and in Cold Shutdown within the following 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> unless the grid conditions improve.
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l A=endment No.
197 l
BASES (Continued) 3.'9 i
can be used for either 125 volt battery, (2) a 250 volt d-c back-up battery charger is supplied.
Thus, on loss of nor=al battery charger, the back-up charger can be used. The 125 volt battery system shall have a minimum of
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105 volts at the battery terminals to be considered operable. The 250 volt battery system shall have a mini =um of 210 volts at the battery ter=inals to be c.onsidered operable.
Automatic second level undervoltage (Degraded Voltage) protection is installed on the startup transformer and is available when safety related loads are being supplied from this source. During normal operation. the unit auxiliary trans-former supplies safety related buses. Automatic second level undervoltage protection is not installed on the unit auxiliary transformer. The Safety Bus Degraded Voltage Alarm System and new Degraded Voltage Operating Procedure will be relied upon to guide Operator action to preclude operation with a degraded bus voltage condition.
I A=end:ent No.
199
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