ML20112E783

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Proposed Tech Spec 3.8.3 Re Incorporation of 5-start Air Pressure Design Criterion for Div III DG
ML20112E783
Person / Time
Site: River Bend Entergy icon.png
Issue date: 05/30/1996
From:
ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20112E768 List:
References
NUDOCS 9606070079
Download: ML20112E783 (6)
v • d • e


Text

Lipcnse Amendment Request 96-25 Ma'y 30,1996 Enclosure 3 TECHNICAL SPECIFICATIONS MARK-UPS i

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9606070079 960530 PDR ADOCK 05000458 P PDR ,

. Diesel Fuel 011, Lube Oil, and Starting Air 3.8.3 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.3.1 Verify each fuel oil storage tank contains 31 days a 45,495 gal of fuel.

SR 3.8.3.2 Verify lube oil inventury is: 31 days

a. 2 367 gal for DGs 1A and 18; and

, b. 2 295 gal for DG 10.

SR 3.8.3.3 Verify fuel oil properties of new and In accordance stored fuel oil are tested in accordance. with the Diesel with, and maintained within the limits of, Fuel Oil the Diesel Fuel Oil Testing Program. Testing Program SR 3.8.3.4 Verify each reouired DG air start receiver 31 days pressure is @ 160 psigl Q. fcf- n

b. 2 *2.00 Oss sia gg r- na Ac IB nc; i . ; c4 SR 3.8.3.5 Check for and remove accumulated water from 31 days each fuel oil storage tank.

SR 3.8.3.6 For each fuel oil storage tank: 10 years

a. Drain the fuel oil;
b. Remove the sediment; and
c. Clean the tank.

RIVER BEND 3.8-23 Amendment No. 81 i

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I l Li, cense Amendment Request 96-25 Ma'y 30,1996 l

Enclosure 4 l

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TECHNICAL SPECIFICATIONS BASES MARK-UPS l

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, .. Diesel Fuel Oil, Lube Oil, and Starting Air B 3.8.3 8 3.8 ELECTRICAL POWER SYSTEMS B 3.8.3 . Diesel Fuel Oil, Lube Oil, and Starting Air l BASES BACKGROUND Each diesel generator (DG) is provided with a storage tank having a fuel oil capacity sufficient to operate that DG for a period of 7 days while the DG is supplying maximum post loss of coolant accident load demand (Ref.1). The maximum load demand is calculated using the assumption that at least two DGs are available. This onsite fuel oil capacity is sufficient to operate the DGs for longer than the time to replenish the onsite supply from outside sources.

Fuel oil is transferred from each storage tank to its respective day tank by a transfer pump associatad with each storage tank. Redundancy of pumps and piping precludes the failure of one pump, or the rupture of any pipe, valve, or tank to result in the loss of more than one DG. All outside tanks, pumps, and piping are located underground. The fuel oil level in the storage tank is indicated in the control room.

For proper operation of the standby DGs, it is necessary to ensure the proper quality of the fuel oil. Regulatory Guide 1.137 (Ref. 2) addresses the recommended fuel oil practices as supplemented by ANSI N195 (Ref. 3). The fuel oil properties governed by these SRs are the water and sediment content, the kinematic viscosity, specific gravity (or API gravity), and impurity level.

The DG lubrication system is designed to provide sufficient lubrication to permit proper operation of its associated DG under all loading conditions. The system is required to circulate the lube oil to the diesel engine working surfaces and to remove excess heat generated by friction during operation. Each engine oil sump contains an inventory capable of supporting a minimum of 7 days of operation.

This supply is sufficient to allow the operator to replenish lube oil from outside sources.

Each DG U ,.'. gas an air start system with adequate capacity forstart att Eve successwc start receiver (s).

(continued)

RIVER BEND B 3.8-41 Revision No. 0

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. Diesel Fuel Oil, Lube Oil, and Starting Air B 3.8.3 BASES SURVEILLANCE SR 3.8.3.3 (continwd)

REQUIREMENTS The Frequency of these Surveillances on the stored fuel oil takes into consideration fuel oil degradation trends indicating that overall fuel oil quality is unlikely to change between Frequency intervals.

SR 3.8.3.4 This Surveillance ensures that, without the aid of the refill compressor. sufficient air start capacity for each DG is avai1 91= J For DG 1A and IB either the forward or rear f ( air start subsystem is capable of starting the respective DG j when air reciever pressure is within limits. For DG IC both

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forward and rear air start subsystem pressures must be "within limit to start the DG. he pressure specified in this SR reflects the value a which this can be W $ accomplished, but is not so high as to result in failing the limit due to normal cycling of the recharge compressor.

1"#i 1 The 31 day Frequency takes into account the capacity, S g"Q . capability, redundancy, and diversity of the AC sources and other indications available in the control room, including alarms, to alert the operator to below normal air start pressure.

SR 3.8.3.5 Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the storage tanks once every 31 days eliminates the necessary environment for bacterial survival. This is the most effective means of controlling microbiological fouling. In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation. Water may come from any of several sources, including condensation, ground water, rain water, contaminated fuel oil, and from breakdown of the fuel oil by bacteria. Frequent checking for and removal of accumulated water minimizes fouling and provides (continued)

RIVER BEND B 3.8-48 Revision No. 0

INSERT 1 For DG 1 A and IB, each starting air system is si7ed to have the capacity for at least one emergency DG start attempt above the air pressure interlock, and multiple manual start attempts below the interlock, without recharging its start receiver (s). For DG IC, the starting air system is sized to have the capacity for at least five successive start attempts without recharging its air start receiver (s). For each DG, either the forward or rear air start subsystem has the capacity to satisfy these multiple start requirements.

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