ML061030399

Tech Spec for Vogtle Electric Generating Plant, Unit 2, Issuance of Emergency Amendment Regarding Condensate Storage Tank Limits

ML061030399
Person / Time
Site:	Vogtle
Issue date:	03/31/2006
From:	Office of Nuclear Reactor Regulation
To:
References
TAC MD0703
Download: ML061030399 (3)

Text

GST 3.7.6 THIS PAGE APPLICABLE TO UNIT 2 ONLY I 3.7 PLANT SYSTEMS 3.7.6 Condensate Storage Tank (CST)

LCO 3.7.6 Two CSTs shall be OPERABLE with:

a. A combined safety-related volume of 2 378,000 gallons; and

b. The CST aligned to supply the auxiliary feedwater pumps shall have a safety-related volume Ž 340,000 gallons.

APPLICABILITY: MODES 1, 2, and 3, ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. CST volume(s) not A.1 Restore volume(s) to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> within limit(s). within limit(s).

B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time not met. AND B.2 Be in MODE 4 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.,'.6.1 Verify CST volumes within limits. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> I Vogtle Units 1 and 2 3.7.6-1 Amendment No.120 (Unit 2)

CST B 3 7.6 THIS PAGE APPLICABLE TO UNIT 2 ONLY I BASE';

LCO established in Reference 4 and exceeds the volume required (continued) by the accident analysis.

The OPERABILITY of the CST is determined by maintaining the tank level at or above the minimum required level. Either CST V4001 or CST V4002 may be used to satisfy the LCO requirement.

For Unit 2 only, two CSTs are required to be OPERABLE with a combined safety-related volume of 2 378,000 gallons, and the CST aligned to supply the auxiliary feedwater pumps shall have a safety-related volume 2 340,000 gallons. The basis for requiring an additional 38,000 gallons of safety-related usable CST inventory is :o support the elimination of the bypass line and associated valve bonnet depressurization line for the 2HV-8701 B RHR suction isolation valve.

The elimination of the bypass line and valve bonnet depressurization line requires an additional 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> for a total of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> prior to placing RHR Train A in service. The additional time ensures that the 2HV-8701 B valve bonnet and the space between the 2HV-8701 B aid 2HV-8701A RHR suction isolation valves have depressurized sufficiently to allow the suction isolation valves to be opened.

APPLICABILITY In MODES 1, 2, and 3, the CST is required to be OPERABLE.

Due to the reduced heat removal requirements and short period of time in MODE 4 and the availability of RHR in MODE 4, the LCO does not require a CST to be OPERABLE-in this MODE.

In MODE 5 or 6, the CST is not required because the AFW System is not required.

(continued)

Vogtle Units 1 and 2 B 3.7.6-3 Rev. 0-3/36

CST B ' .7.6 THIS PAGE APPLICABLE TO UNIT 2 ONLY BASES (continued)

ACTIONS A.1 and A.2 If one or both of the CST volumes are not within limits, the volume(s) must be restored to within limits within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. This Completion Time is acceptable based on: 1) The ACTIONS being entered as soon as the CST level(s) decreased below limit(s), which would provide reasonable assurance of at least sufficient capacity to support AFW operation for at least the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Completion Time; and 2) The low probability of an event occurring during this interval that would require the CSTs to be fully OPERABLE.

B.1 and B.2 If the AFW pumps cannot be aligned to an OPERABLE CST within the required Completion Time, the unit must be placed ir a MODE in which the LCO does not apply. To achieve this status, the unit must be placed in at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in MODE 4 within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.

SURVE.ILLANCE SR 3.7.6.1 REQUIREMENTS CST V4001 (LI-5101 and LI-511 1A)

CST V4002 (LI-5104 and LI-5116A)

This SR verifies that the CSTs contain the required volumes of cooling water. The 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Frequency is based on operating experience and the need for operator awareness of unit evolutions that may affect the CST inventory between checks.

Also, the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Frequency is considered adequate in view of other indications in the control room, including alarms, to alert the operator to abnormal deviations in the CST level.

(continued)

Vogtle Units 1 and 2 B 3.7.6-4 Rev. 0-3106