ML19338C272
| ML19338C272 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/11/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19331C208 | List: |
| References | |
| ISSUANCES-OLA, NUDOCS 8008140335 | |
| Download: ML19338C272 (3) | |
Text
ATTACHMENT "A" LIMITING CONDITIONS FOR OPERATION O
i 3.8 ELECTRICAL POWER SYSTEMS i
3.8.1 A.C. SOURCES
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3.8.1.1 As a minimum, the follcwing A.C. electrical power sources shall be OPERABLE:
a.
Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system.
b.
Two separate and independent Class 1E diesel generators each with:
1.,
A separate day fuel tank containing a minimum volume of 500 gallons of fuel.
I 2.
A separate fuel storage system containing a minimum volume of 19,000 gallons of fuel.
3.
A separate fuel transfer pump.
APPLICABILITY:
RECOVERY MODE.
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 remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1 and 4.8.1.1.2.a.4 in accordance with the applicable row in the Testing Frequency Matrix of Table 3.R-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 Outage at which time 7 days shall be allowed.
b.
With one offsite circuit and one diesel generator or two offsite circuits or two diesel generators.,f the above required A.C. elec-trical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1 and 4.8.1.1.2.a.4 in accordance with the applicable two l
rows in the Testing Frequency Matrix of Table 3.8-1; restore at i
least one of the inoperable sources to OPERABLE status in accordance with the Restoration Time Matrix of Table 3.3-2.
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 MILL ISLAND - UNIT 2 3.8-1 8008140335 b-
. = = = - -
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_ TABLE 3.8-1 TESTING FREQUENCY MATRIX Component Testing i
Frequencies 1
"2 b
b 8
y 2
a j
a a
a i
ag kk b
j b
y t
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 /> thereafter a Offsite power circuit No. I a Offsite power circuit No. 2 b Class 1E diesel generator (Red) i b Class 1E diesel generator (Green) l l
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l TiiREE MILE ISLAND - UNIT 2 3.8-2 I
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TABLE 3.8-2 RESTORATION TIME MATRIX Restore One Restore Other 2
Component Component (Hours)
(Hours) aa 24 72 E
E3 Lft5 g
- t, 8 ab 12 72
%oS g E
Su v
bb 12 72 Note:
a and b above correspond to components described in Specification 3.8.1.1 items a and b respectively.
e Og O
e THREE MILE ISLAND - UNIT 2 3.8-3 M
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