ML20206R599

Proposed Tech Specs,Increasing Frequency for Fire Pump Diesel Engine Surveillance for Unit 1 & Deleting Portion of Surveillance for Fire Pump Diesel Starting 24-volt Battery Bank & Charger for Units 1 & 2

ML20206R599
Person / Time
Site:	North Anna
Issue date:	06/30/1986
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20206R578	List: ML20206R572 ML20206R599
References
NUDOCS 8607070187
Download: ML20206R599 (12)

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I 4 ATTACHMENT 1 l

] PROPOSED TECHNICAL SPECIFICATION CHANGE FOR l.

NORTH ANNA UNIT 1 t

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1 PLANT SYSTEMS l SURVEILLANCE REQUIREMENTS (Continued)

g. At least once per 3 years by performing a flow test of the system in accordance with Chapter 5 Section 11 of the Fire Protection Handbook, 14th Edition, published by the National Fire Protection Association.

4.7.14.1.2 The fire pump diesel engine shall be demonstrated OPERABLE:

a. At least once per 31 days by verifying;

1. The fuel storage tank contains at least 220 gallons of fuel, and

2. The diesel starts from ambient conditions and operates for at least 30 minutes on recirculation flow.

b. At least once per 92 days by verifying that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM D975-74 when checked for viscocity, water and sediment.

c. At least once per 18 months, during shutdown, by subj ecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for the class of se rvice.

4.7.14.1.3 The fire pump diesel starting 24-volt battery bank and charger shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying that:

1. The electrolyte level of each battery is above the plates, and

2. The overall battery voltage is 2 24 volts.

b. At least once per 92 days by verifying that the specific gravity is appropriate for continued service of the battery.

NORTH ANNA - UNIT 1 3/4 7-77

J PLANT SYSTEMS f- SURVEILLANCE REQUIREMENTS (Continued) l c. At least once per 18 months by verifying that:

1. The batteries and battery racks show no visual indication of

! physical damage or abnormal deterioration, and

2. The battery-to-battery and terminal connections are clean, tight, free of corrosion and coated with anti-corrosion material.

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i NORTH ANNA - UNIT 1 3/4 7-78

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ATTACHMENT 2 PROPOSED TECHNICAL SPECIFICATION CHANGE FOR NORTH ANNA UNIT 2

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PLANT SYSTEMS

, SURVEILLANCE REQUIREMENTS (Continued)

c. At least once per 18 months by verifying that:

1. The batteries and battery racks show no visual indication of physical damage or abnormal deterioration, and

2. The battery-to-battery and terminal connections are clean, tight, free of corrosion and coated with anti-corrosion materi-al.

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f NORTH ANNA - UNIT 2 3/4 7-62

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8 9 ATTACIDfENT 3 DISCUSSION or pgop0 SED CHANGES I

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DISCUSSION OF PROPOSED CHANGES

Background

The fire protection system is designed to furnish water and other extinguishing agents with the capability of extinguishing any single or probable combination of simultaneous fires that might occur at the station. A diesel-engine-driven fire pump and a motor driven fire pump are available to supply water for the sprinklers and hose streams. The capacity or each fire pump has been established such that either pump can provide 100*. of the required capacity. The diesel-engine-driven fire pur.

is equipped with an automatic controller starting on low fire protection system pressure. A separate manual operator is also available to start the engine in the event the controller malfunctions. The engine is started by a 24 volt cranking motor. Power for this motor is obtained from either of two 24 volt storage batteries.

Item by Item Discussion of Changes

1. Unit 1-T.S.4.7.14.1.2.C.2 This specification requires that the fire pump diesel engine shall be demonstrated OPERABLE at least once per 18 months, during shutdown, by verifying the diesel starts from ambient conditions on the auto start signal and operates for greater than or equal to 20 minutes while loaded with the firepump. The proposed change would require that this surveillance be performed at least once per 31 days (instead of once per 18 months) and that the engine operate for at least 30 minutes (instead of greater than or equal to 20 minutes). The actual engine surveillance is being performed as described by this proposed change because this is already required by the Unit 2 Technical Specifications (T.S. 4.7.14.1.2.A.2). Hence, this change will make the surveillance requirements consistent for both units. This is reasonable since the engine is part of a shared system.

2. Unit 1 and Unit 2-T.S.4.7.14.1.3.C.1 This specification requires that the fire pump diesel starting 24 volt battery bank and charger shall be demonstrated OPERABLE at least once per 18 months by verifying that the batteries, cell plates and battery racks show no visual indication of physical damage or abnormal deterioration. The proposed change would limit the surveillance requirements to the bctteries and the battery racks. We propose to delete the requirement to visually inspect the battery cell plates because this inspection is somewhat limited in scope since the battery case is opaque and the only visual access to the cell plates is provided by removing the battery caps. As a result, this particular surveillance is of limited value. Additionally, this inspection is not required by the National Fire Protection Association.

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The other surveillance requirements for the battery bank include verifying that:

o the electrolyte level of each battery is above the plates (once per 7 days) o the overall battery voltage is greater than or equal to 24 volts (once per 7 days) o the specific gravity is appropriate for continued service of the battery (once per 92 days) o the battery-to battery and terminal connections are clean, tight, free of corrosion and coated with anti-corrosion material (once per 18 months).

Additionally, Technical Specification 4.7.14.1.2 re, quires that the diesel engine be started at least once per 31 days. (This is currently a requirement in the Unit 2 Technical Specifications and wa are requesting that this be made a requirement in the Unit 1 Technical Specifications.) This surveillance not only demonstrates the operability of the diesel engine, but also directly demonstrates the operability of the batteries since the batteries supply the power to start the engine. This battery functional verification together with the remaining battery surveillance requirements described above are sufficient to demonstrate the operability of the fire pump diesel starting 24 volt battery bank.

50.59 Safety Review We have reviewed the proposed Technical Specifications changes and have concluded that these changes will not introduce an unreviewed safety question as defined in 10 CFR 50.59. Specifically:

1. For the first proposed change (Unit 1-T.S.4.7.14.1.2.C.2)

1. the probability of occurrance or the consequences of an accident or malfunction of equipment important to safety previously evaluated in the safety analysis report is not increased,

11. the possibility for an accident or malfunction of a different type than any evaluated previously in the safetf analysis report is not being created, and 111. the margin of safety as defined in the basis for any technical specification is not reduced because this change reflects the current (and more stringent) requirements of the Unit 2 Technical Specifications which have 2

previously been approved for use, and is consistent with the guidance provided in NUREG-0452, Revision 4.

2. For the second proposed change (Units 1 & 2 - T.S.4.7.14.1.3.C.1)

1. The probability of occurrence or the consequences of an accident or malfunction of equipment important to safety previously evaluated in the safety analysis report is not increased by this proposed change because it does not adversely affect the operability of the batteries.

2. The possibility for an accident or malfunction of a different type than any evaluated previously in the safety analysis report is not being created by this proposed change because it does not involve any change to the physical plant and does not introduce any nev or unique operational modes or accident precursors.

3. The margin of safety as defined in the basis for any techncial specification is not reduced by this proposed change because the operability and performance of the batteries will not be adversely affected by this change to the surveillance requirements.

50.91 Significant Hazards Review In accordance with the provisions of 10 CFR 50.91 we are providing an analysis about the issue of no significant hazards consideration, using the standards of 10 CFR 50.92 and the guidance provided in Generic Letter 86-03. We have concluded that these proposed changes involve no significant hazards considerations. Specifically:

1. The first proposed change (Unit 1-T.S.4.7.14.1.2.C.2) would not

i. involve a significant increase in the probability or consequences of an accident previously evaluated; or

11. create the possibility of a new or different kind of accident from any accident previously evaluated; or iii. involve a significant reduction in a margin of safety because this change reflects the current (and core stringent) requirements of the Unit 2 Technical Specifications which have previously been approved for use, and is consistent with the guidance provided in NUREG-0452, Revision 4.

2. The second proposed change (Units 1 & 2-T.S.4.7.14.1.3.C.1) would not

i. involve a significant increase in the probability or consequences of an accident previously evaluated because 3

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i the proposed change does not adversely affect the operability of the batteries,

11. create the possibility of a new or different kind of accident from any accident previously evaluated because it does r.ot involve any change to the physical plant

and does not introduce any new or unique operational modes or accident precursors, iii. involve a significant reduction in a margin of safety because it does not adversely affect the operability and performance of the batteries,

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as outlined in section 2 of the Item by Item Discussion of Changes.

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l References i 1. Virginia Electric and Power Company, North Anna Power Station Units 1 and 2, Updated Final Safety Analysis Report (June, 1985).

2. North Anna Power Station Technical Specifications - Unit 1 (through Amendment No. 75). .

3. North Anna Power Station Technical Specifications - Unit 2 (through Amendment No. 64).

4. Codes and Standards, Naticaal Fire Protection Association,

" Standard for the Installation of Centrifugal Fire Pumps,"

' NFPA 20-1983.

l 5. NUREG-0452, Revision 4 " Standard Technical Specifications for Westinghouce Pressurized Water Reactors" (Fall 1981).

6. Generic Letter 86-03, " Applications For License Amendments,"

(February 10, 1986).

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