ML20010D770
| ML20010D770 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 08/13/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20010D768 | List: |
| References | |
| NUDOCS 8108310221 | |
| Download: ML20010D770 (8) | |
Text
.
ATTACHMENT TO LICENSE AMENDMENT NO. 55 PROVISIONAL OPERATING LICENSE NO. DPR-16 DOCKET NO. 50-219 F.eplace the following pages of the Appendix "A" Technical Specifications with the enclosed pages. The ravised pages are identified by captioned ame;ndinent number and contain vertical li,nes indicating the area of change.
REMOVE _
INSERT j
3.7-1 3.7-1 3.7-la*
3.7-2 3.7-2 3.7-3 3.7-3 4.7-1 4.7-l*
4.7-la 4.7-2
- 4. 7-2 i
l l
l l
l l
l l
l l
- No channpCinvolved; included for format and pagination purposes only.
8108310221 8 ]10013y I
(
PDR ADOCK OS e-
~
/
3,7-1 3.7 AUX 1LI ARY ELECTRICAL ('9.ER Acolicability:
Appties to ine operating status of the auxilary olectrical power supply.
Ob ject i ve:
To assure the operability of the auxiliary electrical power supply.
3pecification.
A.
The reactor snali not be made critical unless all of the followi'a
- equirements are satisfied:
1.
The 'ollowing buses or paneic energized.
a.
4160 volt buses 1C and 10 in the turbine bui l ding switchgear room.
b.
460 voit buses 1 A2, 182, 1 A21, 1821 vital MCC 1A2 and 1B2 in the reactor building switchgear room:
1A3 and 183 at the intake structure; 1A21A, 1821A, 1 A218, and 18218 and vital MCC 1682 on 23*6" elevation in th$ reactor building; 1A24 and 1824 at the stack.
- c. 208/120 volt panels 3, 4, 4A, 48, 4C and VACP-1 in the reactor building switchgear room.
d.120 volt protection panel 1 and 2 in the caole room.
e.125 voit DC distribution centers C and B, and panet D, Panel DC-F, isolation valve motor control center DC-1 and 125V DC motor control center DC-2.
f. 24 volt D.C. power panel s A and B in the cable room.
- 2. One 230 KV line is fully operat*onal and switch gear and both startup transformers are energizec to carry power to the station 4100 voit AC buses and carry power to or away frdm the plant.
- 3. An additional source of power consisting of one of the following is in service connected to f eed the appropriate plant 4160 V bus or buses:
a.
A secona 230 KV line f ully operational.
l b.
One 34.5 KV line fully operational.
- 4. The station batteries B and C are aval'lable for normal service and a battery charger is in service for each battery.
Amendment No.. R; 55
(
t, j
~
3.7-la i,,
B.
The. reactor shall be placed in the cold shut-j comn position if the availability of power e
falls below that required by Specification A above, except that the reactor may remain in operation for a period not to exceed 7 i
days in any 30 day period if a startup transformer is out of service.
e i
1 l
s I
f I
1 I
Amendment No. #, 55
9
- 3. 7-2 l
1 None of the engineered safety feature-equipment fed by the remaining transformer =ay be out of service.
l C.
Standby Diesel Generators 1.
The reactor shall not be made critical unless both diesel generators are operable and caeable of feeding their l
designated 4160 volt buses.
I 2.
If one diesel generator becomes inoperable during power operation, repairs,shall be ini:iated i==ediately and the other diesel.shall be operated at least one hour every i
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at greater than 20: rated power until repairs are completed. The reactor may remain in operation for a period not to exceed 7 days in any 30-day period if a diesel generator is out of service. During the repair period none of the e:gineered safety features normally fed by the operational diesel generator may be out of service or the reactor shall be placed in :he cold shot-down condition, j 3.
If both diesel generators become inoperable during power operation, the reactor shall be placed in the cold shut-dein condition.
4.
For the diesel generators to be considered operable there shall be a =1:1=um of 14,500 gallons of diesel fuel in the standby diesel generator fuel tank.
3ases:
The general objective is to assure an adequate supply of power l
vith at least one active and one standby source of ppwer available for operation of equip =ent required for a safe plan: shutdown, to
=ain:ain the plant in a safe shutdown condition and to operate the :r: quired engineered safety feature equip =ent following an accident.
AC power for shutdown and operation of engineered safety feature equip =ent can be provided by any of four active (two 230 K7 and two 34.5 K7 lines) and either of two standby (two diesel generators) sources of power. Nor= ally all six sources are available.
However, to provide for =aintenance and repair of equipment and s:ill have redundancy of peser sources the requirement of ora active and one standby source of / wer was established. The plant's main generator is not given credit as a source since it is not available during shutdown. The plant 125V DC power is normally supplied by two batteries, each with two associated full oupacity chargers. One charger on each battery is in service at all times with the second charger available in the event of charger failure. These chargers are active sources and supply the normal 125V DC requirements with the batteries and standby l
sources. (1)
In applying the mininim requir ement o.' one active and one standby source of AC power, s.1ce both 230 KV lines are on the same set of towers, either one or both 230 KV lines are considered as a single active scurce.
Amendment No. A4', 55
~.
3.7-3
- /
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 diesels when s,smchreni ation 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 synchroni:ation 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 safqty features after an accident or for safe shutdown can be supplied by one diesel generator the specification requirement for 14,500 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, the load requirement for the loss of offsite power would require 11,750 gallons for a three day supply.
For the case of loss of,offsite power plus loss-of-coolant plus bus failure 11,300 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 require =ents (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 l
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 Reactor Building Closed Cooling hater Pump.
2.
One Core Spray Pump.
3.
One Core Spray Booster Pump.
4.
One Control Rod Drive Pump.
5.
One Service Water Pump.
6.
One Containment Spray Pump 7.
One Emergency Service Water Pump.
With these. pieces of equipment tak en off at 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after t
the incident it would require a total cons'umption of 14,230 gallons for a three day supply.
References:
(1)
Letter, Ivan R. Finfrock, Jr. to the Director of Nuclear Reactor Regulations dated April 14, 1978.
Amendment No. 55
i.
4.7-1 4.7 AUXILIARY ELECTRICAL PO'JER Appif cability: Applies to surveillance requirements of the auxiliary electrical supply.
Obj ective:
To verify the availability of the aur.iliary electrical supply.
Specification:
A.
Diesel Generator 1.
Each diesel generator shall be started and loaded to not less than 20% rated power every two weeks.
2.
The two diesel generators sha'11 be automatically '
actuated and functionally tested during each refueling outage. This shall include testing of the diesel generator load sequence timers listed in Table 3.1.1.
3 Each diesel generator shall be given a thorough in-spection at least' annually.
4.
The diesel generators fuel supply shall be checked following the above tests.
5 The diesel generators' starting batteries shall be tested and =onitored the same as the station batteries, Specification 4.7.b.-
)
\\
1 1
l Bacis,:
The biweekly tests of the diesel generators are prinarily to check for failures and deterioration in the system since last use. The manufacturer has recem= ended the two week test interval, based on experience with cany of their engines.
One factor in determining this test interval (besides checking Amendment No.15, February 24, 1976 l
~
4.7-la B.
Station Batteries 1.
Weekly surveillance will be performed to verify the following:
a.
The active metallic surface of the plates shall be fully covered with electrolyte in all batteries, b.
The designated pilot cell vol tage is greater than or-equal to 2.0 volts and c.
The overall battery voltage is greater than or equal to 120 volts (Diesel battery; 112 volts).
d.
The pilot cell sp#ecific gravity, corrected to 77 F,
is greater than or equal to 1.190.
2.
Quarterly Surveillance will be performed to verify the following:
a.
The active metallic surface of the plates shall be fully covered with electrolyte in all batteries, b.
The voltage of each connected cell is greater than or equal to 2.0 volts under float charge and c.
The specific gravity, for each cell, is greater than or equal to 1.190 when corrected to 77
- F.
The electrolyte I
temperature of every fifth cell (Diesel; every fourth cell) shall Dc recorded for surveillance review.
l l
3.
At least once per 18 months during shutdown,.the following tests will be performed.to verify battery capacity.
l a.
Battery capacity shall be demonstrated to be at least 80% of the manufacturers' rating
(
wheq subjected to a battery capacity discharge test.
b.
Battery low voltage annunicators are verified to pick up at 115 volts! I volt and to reset at 125 voltsi 1 volt (Diesel; 112 volts 1 1 volt).
Amendment No. 55
l 4.7-2 1
The biweekly tests of the diesel generators are primarily to Pasis:
check for failures and deterioration in the system since last The manufacturer has recommended the two week test use.
interval, based on experience with many of their engines.
i One factor in determining this test interval (besides check ng whether or not the engine starts and runs) is that the lubricating oil should be circulated through the engine approximately every two weeks. The diesels should be i
loaded to at least 20'. of rated power until engine and generator temperatures have stabili:ed (about one hour).
l The minimum 20'. Icad will ' prevent soot formation in the cylinders and injection no::les. Operation up to an equilibrium temperature ensures that there is no over-heat problem. The tests also provide an engine and generator i
operating history to be compared with subsequent engine-l generator test data to identify and correct any mechanical or electrical deficiency before it can result in a system j
failure.
n e test during refueling outages is more comprehensive, including procedures that are most effectively conducted at that time. These include automatic actuation and functional capability tests, to verify that the generators -
can start and assume load in less than 20 seconds and testing of the diesel generator load sequence timers which provide protection from a possible diesel generator overload during LOCA conditions. The annual, thorough inspection will detect any signs of wear long before failure.
l The =anufacturer's instructions for battery care and mainten-ance with regard to the floating charge, the equaliting charge, and the addition of water will be followed.
In addition, written records will be maintained of the battery perfor=ance.
Station batteries will deteriorate with time, but precipitous failure is unlikely. The station surveillance procedures follow the reco mended maintenance and testing practices of IEEE STD. 450 which have demonstrated, thorough experience,'the ability to provide positive indications of cell deterioration tendencies long before such tendencies cause cell irregularity or i= proper cell performance.
l l
l l
Amendment No.
55
---<--w
=-v
m.
. - -,, - =,, --
-*-+-w-----e-a
+e
.a w, - -
--,r
-v--v
eyw-r w-*-
r-w-y----w.--
ge-M tMt"---
T h"?--
- "-*'-"P
""-*P
'T T - * ~ " ' ' '