ML20063F625
| ML20063F625 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/04/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20063F627 | List: |
| References | |
| NUDOCS 9402150090 | |
| Download: ML20063F625 (4) | |
Text
TABLE 3.3-4 (Continued)
ENGINEERED SAFETY FEATURES ACTUATION SYSTEM INSTRUMENTATION TRIP SETPOINTS FUNCTIONAL UNIT TRIP SETPOINT ALLOWABLE VALUES Eo" 5
7.
Loss of Power
>S (4.16 kV Emergency Bus Undervoltage) n a.
First level N
g 1)
Diesel Start 2 0 volts with a 2 0 volts with a oo s 0.8 second time delay 5 0.8 second time delay and and c
M z
2 2583 volts with a
> 2583 volts with a jus 3
s 10 second time delay s 10 second time delay y
2)
Initiation of Load Shed One relay One relay 2 0 volts with a
> 0 volts with a
[
s 4 second time delay s 4 second time delay and and 2 2583 volts with a 2 2583 volts with a s 25 second time delay s 25 second time delay with one relay with one relay g
2 2870 volts, instantaneous 2 2870 volts, instantaneous a
b.
Second Level y
1)
Diesel Start 2 3785 volts with a 2 3785 volts with a l
3 s 10 second time delay s 10 second time delay 2)
Initiation of Load Shed 2 3785 volts with a 2 3785 volts with a l
s 20 second time delay s 20 second time delay
-8.
Engineered Safety Features Actuation 8-System Interlocks k
a.
Pressurizer Pressure, P-Il s 1915 psig s 1920.6 psig b.
DELETED
[
c.
Reactor Trip, P-4 N.A.
N.A.
y NOTE 1:
Time constants utilized in the lead-lag controller for Steam Pressure - Low are 7, - 50 seconds and -
g r
5 seconds.
a SkeamGener TD - [Bl(P)gtor Water level Low-Low Trip Time Delay NOTE 2:
5-
+ B2(P)2 + B3(P) + B4][0.99]
3 m Where: P = RCS loop AT Equivalent to Power (%RTP), P s 50% RTP y
gr TD - Time Delay for Steam Generator Water Level Low-Low Reactor Trip (in seconds) a Generators affected 5-
[ 3 B1 - -0.0072 B2 - +0.8181 m-B3 - -31.72 B4 - +468.8
= -
( ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class IE Distribution System shall be:
a.
Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated power availability, and b.
Demonstrated OPERABLE at least once per 18 months during shutdown by:
1)
Transferring 4 kV vital bus power supply from the normal circuit to the alternate circuit (manually and automatically) and to the delayed access circuit (manually), and -
2)
Verifying that on a Safety Injection test signal, without loss of offsite power, the preferred, immediate access offsite power source energizes the emergency busses with permanently connected loads and energizes the auto-com ected emergency-(accident) loeds through sequencing timern 4.8.1.1.2 Each diesel generator ^ shall be demonstrated OPERABLE:
a.
In accordanr1 with the. _,.....cy specified in Table 4.8-1 on a STAGGERED ~S'T BASIS by:**
1)
Verifying the fuel level in the engine-mounted fuel tank, 2)
Verifying the diesel starts from ambient condition and accelerates to at least 900 rpm in less than or equal to 10 seconds. The generator voltage and frequency shall be 4160 +
240/-375 volts and 60 i 1.2 Hz within 13 seconds after the start signal. The diesel generator shall be started for this test by using one of the following signals:
a)
Hanual, or b)
Simulated loss of offsite power by itself (Startup bus undervoltage), or c)
A Safety Injection actuation test signal by itself.
- For a five diesel generator configuration, tests of Diesel Generator 3 to satisfy the frequency specified in Table 4.8-1 and in Surveillance Requirement 4.8.1.1.2b for one unit may be counted in determining whether the frequency specified in Table 4.8-1 and in Surveillance Requirement 4.8.1.1.2b for the other unit is satisfied. Unit-specific portions of this Surveillance Requirement for Diesel Generator 3 shall be pc-formed on an alternating schedule with signals from Units 1 and 2.
i
- All diesel generator starts for the purpose of this surveillance test may be preceded by an engine prelube period.
Further, all surveillance tests, with the exception of once per 184 days, may also be preceded by warmup procedures (e.g., gradual acceleration and/or gradual loading > 150 sec) as recommended by the manufacturer so that the mechanical stress and wear on the diesel engine is minimized.
DIABLO CANYON - UNITS 1 & 2 3/4 8-3 Amendment Nos. 86 & 85
T ELECTRICAL POWER SYSTEMS
(
SURVEILLANCE RE0VIREMENTS (Continued) 3)
Verifying the generator is synchronized,. loaded to greater than or equal to 2484 kW in less than or equal to 60 seconds, and operates for greater than or equal to 60 minutes, 4)
Verifying the diesel generator is aligned to provide standby power to the associated emergency busses,* and 5)
Verifying the diesel engine protective relay trip cutout switch is returned to the cutout position following each diesel generator test.
b.
At least once per 18 months during shutdown **, by:
1)
Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service; 2)
Verifying that the load sequence timers are OPERABLE with each load sequence timer within the limits specified in Table-4.8-2; 3)
Verifying the generator capability to reject a load of greater than or equal to 508 kW while maintaining voltage at 4160 +-
240/-375 volts and frequency at 60 i 3 Hz; 4)
Verifying the generator capability to reject a load of greater i
than or equal to 2484 kW without tripping.
The generator voltage shall not exceed 4580 volts during and following the load rejection; 5)
Simulating a loss of offsite power by itself, and:
a)
Verifying de-energization of the emergency busses and load
[
shedding from the emergency busses, and b)
Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the required auto-connected loads through sequencing timers and operates for greater than or equal to 5_ minutes while its generator is loaded with the permanent and auto-connected loads. After energization of these loads, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 + 240/-375 volts and 6011.2 Hz during this test.
- For a five diesel generator configuration, this may be the associated bus in the other unit if that unit is in MODE 1, 2, 3 or 4.
- For a five diesel generator configuration, these surveillance requirements i
can be performed on the third (common) diesel generator with only one'anit shutdown.
DIABLO Cf.NYON - UNITS 1 & 2 3/4 8-4 Amendment Nos. 86 & 85
4 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 6)
Verifying that on a Safety Injection test signal without loss
'of offsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 4160 + 240/-375 volts and 60 i 1.2 Hz within 13 seconds after the auto-start signal; the steady state generator voltage and frequency shall be maintained within these limits during this test; 7)
Simulating a loss of offsite power in conjunction with a Safety Injection test signal, and:
a)
Verifying de-energization of the emergency busses and load shedding from the emergency busses; b)
Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through sequencing timers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads. After energization of these loads, the steady state voltage and frequency of the emergency busses shall be maintained at 4160 + 240/-375 volts and 60 i 1.2 Hz during this test; and c)
Verifying that all automatic diesel generator trips, except engine overspeed, low lube oil pressure and generator differential, are bypassed when the diesel engine trip cutout switch is in the cutout position and the diesel is aligned for automatic operation.
8)
Verifying the diesel generator operates for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 2750 kW and during the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 2484 kW. The. generator voltage and frequency shall be 4160 + 240/-375 volts and
?
60 i 1.2 Hz within,13 seconds after the start signal. Within 5 minutes after completing _this 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, perform Specification 4.8.1.1.2b.5)b);*
9)
Verifying that the auto-connected loads to each diesel generator do not exceed the maximum rating of 2750 kW;
- 10) Verifying the diesel generator's capability to:
- 1f Specification 4.8.1.1.2b.5)b) is not satisfactorily completed, it is not-necessary to repeat the preceding 24-hour test.
Instead the diesel generator may be operated at 2484 kW for I hour or until operating temperature has stabilized.
DIABLO CANYON - UNITS 1 & 2 3/4 8-5 Amendment Nos. 86 & 85
.