ML19323A904
| ML19323A904 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/28/1980 |
| From: | METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19323A903 | List: |
| References | |
| NUDOCS 8005060247 | |
| Download: ML19323A904 (3) | |
Text
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O V
800 5060 2d/5
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LIMITING CONDITIONS FOR OPERATION 3.8 ELECTRICAL POWER SYSTEMS 3.8.1 A.C. SOURCES 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
Two physically independent circuits between the offsite transmission a.
network and the onsite Class lE distribution system.
b.
Two separate and independent Class lE diesel generators each with:
1.
A separate day fuel tank containing a minimum volume of 500 gallons of fuel.
2.
A separate fuel storage system containing a minimum volume of 19,000 gallons of fuel.
3.
A separate fuel transfer pump.
1 APPLICABILITY:
REC 0VERY MODE.
l l
ACTION:
a.
With either an offsite circuit or diesel generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remainina A.C. sources by performing Surveillance Requi rements 4. 8.1.1. l and 4. 8.1.1. 2. a. 4 I
in accordance with the applicable row in the Testing Frequency Matrix of Table 3.8-1; restore the full complement of the above required A.C. electrical power sources to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, except when performing the Annual Preventive Maintenance l
Outage at which time 7 days shall be allowed.
i b.
With one of f site circuit and one diesel generator or two offsite circuits or two diesel generators of the above required A.C. elec-trical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Reauirements 4.8.1.1.1 and 4.8.1.1.2.a.4 in accordance l
with the applicable two rows in the Testing Frequency Matrix of Table 3.8-1; restore at least one of the inoperable sources to OPERABLE status in accordance with the Restoration Time Matrix of Table 3.8-2.
Restore the full complement of the above required A.C.
electrical power sources to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> from the time of initial loss.
THREE MILE ISLAND - UNIT 2 3.8-1
TABLE 3.8-1 4
TESTING FRE0UENCY MATRIX 4
Component Testing Frequencies "1
"2 b) b 2 I
a) ag E
E b
E-1 5
a b
3
{
2 i
E
_E b
Ni l-
- \\
e I
/
Key: "Within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereaf ter I
a Offsite power circuit No. 1' a Offsite power circuit No. 2 b Class lE diesel generator (Red) b Class lE diesel generator (Green)
THREE MILE ISLAND - UNIT 2 3.8-2
TABLE 3.8-2 As.,,
RESTORATION TIME MATRIX RestoreOtherl Restore One Component Component (Hours)
(Hours) l I
aa 24 72 i
ab 12 72 B
95 1
g 5-o 0
bb 12 72 e53 E b 88
- 5 I
I I
Note:
e and b above correspond to components described in Specification 3.8.1.1 items a and b respectively.
THREE MILE ISLAND - UNIT 2 3.8-3
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