ML20236T426

Requests Encl Draft Document Re 871202-03 Meetings Concerning Facility Tech Spec Upgrade Program Section 3/4.8, Auxiliary Electric Power Sys Be Provided to NRC & Lpdrs

ML20236T426
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/24/1987
From:	Heitner K NRC
To:	NRC
References
NUDOCS 8712010230
Download: ML20236T426 (4)

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4 FORT ST. VRAIN TECHNICAL SPECIFICATION UPGRADE PROGRAM SECTION 3/4.8 - AUXILIARY ELECTRIC POWER SYSTEMS Meeting Date: December 2/3,1987 DRAFT Items to be Discussed:

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1. LCOs 3.8.1.1b.4 and 3.8.1.2b.4 both require 100 gallons of diesel lubricating oil to be present for operating conditions (2 diesel generator sets required to be operable) and shutdown (1 diesel generator set required to be operable) respectively. It is not clear whether the 100 gallons required is for each operable set or for common storage. This should be clarified.

l 2. Surveillance procedure 4.8.1.1.2e.S.b allows 60 seconds for the ,

diesel generator sets to auto-start and energize the essential buses. Surveillance procedure 4.8.1.1.2f allows 20 seconds to accelerate to 1200 rpm. We could find no basis for this time being greater than 15 seconds (Section 8.2.5.2 of the updated FSAR, Revision 5). These allowances should therefore be changed to 15 l seconds.

3. Surveillance procedure 4.8.1.1.2e.8 calls for tests of the diesel generator sets at ;t 1200 kW for 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br />. Surveillance procedure 4.8.1.1.2a.7 is similar for at least 60 minutes. Damage to the l generators could occur when operating at greater than full continuous l

load, especially when considering possible instrument inaccuracies '

that could actually call for a greater than full load. Therefore, even though the STS has the same potential for generator damage, this requirement should be changed to a range (such as 1150 50 kW) with the load verified by instrumentation recently calibrated and of known accuracy.

DRAFT  ;

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4. Section 3/4.8.2 Action a, acknowledges that a battery equalizing ~ j charge can exccod 24 hourc; however, it docc not rectrict the longth j of the equalizing charge'(said to be between 3 and 5 days) nor the l j

frequency with which equalizing charges can be applied. Batteries must be maintained in a state of readiness, available for immediate use for events such as station blackout and for diesel generator I controls and field flashing and bus load shedding and control (see basisonpage3/48-15). Therefore, the 5-day limit should be  :

imposed, and an equalizing charge while operating should be made the _

exception rather than an everyday occurrence. ]

5. Section 3/4.8.2 Action b does not direct efforts towards restoring an inoperative battery charger until the battery is declared inoperative. This is not acceptable. A dedicated battery charger l should be required to be placed (returned) to service with the same expediency that a battery is (restore to OPERABLE status within 24 l hours or be in at least SHUTDOWN within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />).

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6. In the December 18, 1986 meeting, it was stated that plant specific values for Table 4.8.2.1 would be provided, specifically for specific l gravity and cell voltage. Other than specific gravity for Category A, there were no changes. We also note that battery IC is of l

different design from batteries 1A and IB. Therefore, separate i values may be necessary. We could not find this item addressed in the August 24, 1987 (P-87272) response.

7. (a) Section 4.8.2.lf, 'perfortnance discharge tesis' should be

' performance discharge test'.

(b) On page 3/4.8-26, references to ' Table 4.8-2' should be

' Table 4.8.2-1'.

(c) On page 3/4.8-15, reference to 'any of the five off-site sources' should be changed to be in agreement with 3.8.1.la.

DRAFT

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(d) Is it necessary to include operability of the main transformer in conjunction with capability of the UAT7 ,

l (e) What is the resistance of the inter-rack connections for the batteries (4.8.2.1b.2 and 4.8.2.lc.3), and is there a reason this value should not be trended?

(f) Is the 121.5 volts in surveillance requirement 4.8.2.la.2. with reference to cells that are jumped out, the individual cell voltage or both?

DRAFT l i

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