ML19323A896
| ML19323A896 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/29/1979 |
| From: | Harvey S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| Shared Package | |
| ML19323A861 | List: |
| References | |
| 2-AP-22.7, NUDOCS 8005060185 | |
| Download: ML19323A896 (5) | |
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2-^r-22 7 Page 1 of 5 i
11-29-79 L..
VIRGINIA ELECTRIC AND POWER COMPANY NORTH A'.NA PO'4R STATION LWIT NO. 2 LOSS OF EtERGENCY CONDENSATE STOP. AGE TANK
REFERENCES:
1.
T.S. 3.7.1.2, 3.7.1.3, 3.7.5.1 2.
12050-FM-74A 3.
12050-LSK-5-13A, B and C 4.
12050-ESK-5AA, SAB, 6PR, and 6CL 5.
Final Safety Analysis Report k
REV.
PAGE DATE APPROVAL
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nu APPROVED BY:
N. S.y -w CRAIPJ'ANJATION NUCLEAR S.?SETY A.'.T OPERATING CO.T!ITTEE DATE:
11-29-79 SAFETY RELATED
2-AP-22.7 Page 2 of 5 11-29-79 1.0 Purcose 1.1 This procedure provides indication of, probable causes for and immediate and long term operator actions to be taken in the event of a loss of the Emergency Condensate Storage Tank 2-CN-TK-1.
2.0 Indications 2.1 ECST lo/lo level alam.
2.2 LI-CN-200 indicates decreasing level.
2.3 PI-FV-203A, 203B and 203C indicate decreasing AIV Pump Suction Pressure.
NOTE:
An AW Pump Suction Pressure of 4 PSIG indicates as ECST Level of approximately 9 feet, which is the lo/lo level alam setpoint.
3.0 Probable Cause 3.1 Water supply to ECST being depleted.
3.2 Rupture of 2-CN-TK-1.
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2-AP-22.7 Page 3 of 5 11-29-79 4.0 Im:nediate Operator Actions 4.1 None
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2-AP-22.7 Page 5 of 5 j
11-29-79 3
Initials 5.0 Long Term Goerator Action (cont.)
5.9 If it is not desired to fill 2-CN-TK-1 from the firemain syste:n or the service water syste:n unlock and close the following valves:
2-W-145 (Normal Suction for 2-W-P-2).
2-W-162 (Normal Suction for 2-W -P-3A).
2-W-180 (Normal Suction for 2-W-P-3B).
NOTE:
Return auxiliary feedwater syste:n to normal by 2-AP-22.8.
Completed By:
Date:
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2-AP-22.7 Page 4 of 5 11-29-79 Initials 5.0 Long Term Ooerator Action NOTE:
When level in emergency condensate storage tank reaches 9 feet (37.3% as read on LI-CN-200 in control room) or when suction pressure to aux feed water pumps reaches 4 psig, commence filling the emergency condensate storage tank.
5.1 Lineup either firemain or service water to supply auxiliary feed water as follows NOTE:
Firemain or service water should be lined up to supply auxiliary feed water only in the event that 2-CN-TK-1 is unavailable or will become unavailable and all normal makeup sources to 2-CN-TK-1 are depleted, lost or insufficient and water MUST be added to the steam generator.
5.2 Open 2-FP-84 (Post Indicator Valve).
5.3 Close 2-FW-203.
5.4 Close 2-FW-176.
k 5.5 Unlock and open the following valves:
2-FW-147 (Alternate Suction for 2-FW-P-2).
i 2-FW-164 (Alternate Suction for 2-FW-P-3A).
i 2-FN-182 (Alternate Suction for 2-FW-P-3B).
5.6 If firemain is to be used start the desired fire pump.
NOTE:
If 2-FP-02 is used actual water supply will be the S.W.
Reservoir. Firemain f rem the lake is the preffered source of alternate mode up due to the chemistry of the, S.W. Reservoir.
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5.7 Unlock and open 2-FW-175.
(Firemain supply to auxiliary feed '
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water).
5.8 If service water is to be used UNLOCK and OPEN 2-FW-202.
(Service water supply to auxiliary feedwater).
NOTE:
If the service water reservoir is used as the source of
'k water it must be noted that the S.W. Pumps Lose Suction at a Reservoir Level of 305" 6".
S.W. Reservoir Level must be maintained according to T.S. 3.7.5.1.