ML20032A711
| ML20032A711 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 10/19/1981 |
| From: | JERSEY CENTRAL POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20032A708 | List: |
| References | |
| NUDOCS 8111020227 | |
| Download: ML20032A711 (4) | |
Text
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QD WE 3.1-Ila hk Hd CD TABLE 3.1.1 PROTECTIVE INSTRUMENTATION REQUIREMENTS (cont'd) 63 O
l 7<sh Min. No. of J
- '1hi'L4 Min. No. of Operable Reactor Modes Operabic or Instrument in Which Function Operating Channels Per Must Be Operabic (Tripped) Trip Operable Function Trip Setting Shutdown Refuel Startup Run Systems Trip Systems Action Required
- Diesel Generator Load Sequence Timers (Cont'd) 2.
CRD pump 60 sec ! 15%
X X
X X
2(m) 1(n)
Consider the pump inoperable and comply with Spec.
3.4.D (See Note q).
3.
Emerg. Service 45 sec. ! 15%
X X
X X
2(m) 1(n)
Consider the loop j
Water Pump (r) inoperable and comply with Spec.
i 3.4.C (See Note q).
(SKIA) 4.
Service Water 120 sec ! 15% (SK2A) X X
X X
2(o) 2(p)
Consider the pump in-Pump (aa) 10 sec ! 15% (SK7A) operable and comply (SK8A) within 7 days (See Note q).
I 5.
Closed Cooling 166 sec ! 15*.
X X
X X
2(m) 1(n)
Consider the pump in-Water Pump (bb) operable and comply within 7 days (See Note q).
3.1-13 e
i TABLE 3.1.1 (Cont'd)
- i. The interlock is not required during the start-up test program and demonstration 'of plant electrical output but shall be provided following these actions.
- j. 'Not required below 405 of ' turbine rated steam flow.
k.
All four (4) drywell pressure instrument channels may be mad inoperable during the integrated primary containment leakage rate test (See Specification 4.5), provi ed that the plant is in the cold shutdown J
condition and that no work is performed on the reactor or its connected systems which could result in lowering the reactor water level to less than 4'8" above the top of the active fuel.
1.
Bypassed in IRM Ranges 8, 9, 6 10.
m.
There is one time delay relay associated with each of two pumps.
n.
One time delay relay per pump must be operabic.
There are two time delay relays associated with each of two pumps. One timer per pump is for sequence o.
starting (SKI A, SK2A) and one timer per pump is for tripping the pump circuit brea^.er (SK7A, SK8A),
p.
Two time delay relays per pump must be operable.
q.
Manual initiation of affected compcnent can be accomplished after the automatic load sequencing is completed.
r.
Time delay starts after closing of containment spray pump circuit breaker.
These functions not' required to be operable with the reactor temperature less than 212*F and the vessel s.
head removed'or vented.
t.
These functions may be operable or bypassed when corresponding portions in the same core spray system logic train.are inoperabic per Specificatian 3.4.A.
These functions not required to be operable when primary containment integrity is not required to be maintained.
u.
e
l 3.1-14 4
TABLE 3.1.1 (Cont'd) v.
These functions not required to be operable when the ADS is not required to be operable.
w.
These functions must be operabic only when irradiated fuel is in the fuel pool or reactor vessel and secondary containment integrity is required per specification 3.5.B.
y.
The number of operable channels may be reduced to 2 per Specification 3.9-E and F.
z.
(LEFT INTENTIONALLY BLANK) aa. Pump circuit breakers will be tripped in 10 seconds ! 15% during a LOCA by relays SK7A and SX8A.
4 bb. Pump circuit breakers will trip instantaneously during a LOCA.
b j
i a
O
e 4
/
.~-
3.7-3 4
The probability analysis in Appendix "L" of the FDSAR was, based on one diesel and shows that even with only one diesel the probability of requiring engineered safety features at the same time as the second diesel fails is quite small. This analysis used information on peaking diesel's when synchronization was required which is not the case for Oyster Creek. Also the daily test of the second diesel when one is temporarily out of service tends to improve the reliability as does the fact that synchronization is not required.
As indicated in Amendment 18 to the Licensing Application, there are numerous sources of diesel fuel which can be obtained within 6 to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and the heating boiler fuel in a 75,000
~
gallon tank on the site could also be used. Since the requirements for operation of the required engineered safety features after an accident or for safe shutdown can be supplied by one diesel-generator the specification requirement for 14,S00 gallons :
of diesel fuel can operate one diesel at a load of 2640 KW for 3 days. As indicated in Amendment 32 of the Licensing Application
^
and including the Security System loads, the load requirement for the loss of offsite power would require 12,410 gallons for a three day supply. For the case of loss of offsite power plus loss-of-coolant plus bus failure 9790 gallons would be required for a three day supply.
In the case of loss of offsite power plus loss-of-coolant with both diesel generators starting the load'~
requirements (all equipment operating) shown there would not be three days' supply. However, not all of this load is required for three days and, after evaluation of the conditions,.
loads not required on the diesel will be curtailed.
It is reasonable to expect that within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> conditions can be evaluated and the following loads curtailed:
1.
One Core Spray Pump 2.
One Core Spray Booster Pump 3.
Ore Control Rod Drive Pump 4.
One Containment Spray Pump S.
One Emergency Service Water Pump With these pieces of equipment taken off at 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after the incident it would require a total consumption of 12,840 gallons for a three day supply.
4 n
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