ML17292B488

Proposed Tech Specs SR 3.8.1.8,allowing Capability to Manually Transfer Between Preferred & Alternate Offsite Power Sources During Modes 1 & 2 by 990125

ML17292B488
Person / Time
Site:	Columbia
Issue date:	12/17/1998
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
Shared Package
ML17292B487	List: ML17292B486 ML17292B488
References
NUDOCS 9812290354
Download: ML17292B488 (8)

Text

REQUEST FOR AMENDMENT TECHNICALSPECIFICATION SR 3.8.1.8 Attachment 4 Marked-Up Version of Technical Specification 3.8.1.8 and Associated Bases 98i2290354 98i2i7 05000397 )'j PDR ADQCK P PDR

AC Sources Operating 3.8.1 SURVEILLANCE REQUIREMENTS continued SURVEILLANCE FREQUENCY SR 3.8.1.7 NOTE-All DG starts may be preceded by an engine prelube period.

Verify each required DG starts from standby 184 days condition and achieves:

a. For DG-1 and DG-2 in a 15 seconds, voltage ~ 3910 V and frequency a 58.8 Hz, and after steady state conditions are reached, maintains voltage a 3910 V and ( 4400 V and frequency a 58.8 Hz and x 61.2 Hz; and b.

)For3740DG-3, andin afrequency V

15 seconds, voltage

) 58.8 Hz, and after steady state conditions are reached, maintains voltage a 3740 V and a 4400 V and frequency a 58.8 Hz and a 61.2 Hz.

NOTE Wis Surveillance shall not be performed in NODE 1 or 2. However, credit may be taken The a.u.Q~kic kraesQr for unplanned events that satisfy this SR.

~CD'On og Verify automatic and manual transfer of the 24 months power supply to safety related buses from the startup offsite circuit to the backup offsite circuit.

(continued)

WNP-2 3.8-8 Amendment No. 149

AC Sources Operating B 3.8.1 BASES SURVEILLANCE SR 3.8. 1.6 (continued)

RE(UIREHENTS The Frequency for this SR corresponds to the testing requirements for pumps as contained in the ASME Boiler and Pressure Vessel Code,Section XI (Ref. 17).

SR 3.8.1.8 Transfer of Division 1 and 2 4.16 kV ESF buses (SH-7 and SN-8) power supply from the startup offsite circuit to the backup offsite circuit demonstrates the OPERABILITY of the alternate circuit distribution network to power the Division 1 and 2 shutdown loads. The 24 month Frequency of the Surveillance is based on engineering judgment taking into consideration the plant conditions required to perform the Surveillance, and is intended to be consistent with expected fuel cycle lengths. Operating experience has shown that these components usually pass the SR when performed on the 24 month Frequency. Therefore, the Frequency was concluded to be acceptable from a reliability standpoint.

bs4lc4 d.pplAL + This SR is modified by a Note The reason for the Note is vev~g>~>im o4

+ran jkv that, during operation with the reactor critical, performance of this SR could cause perturbations to the 4'u,gwn,Qc, WuACkl~ . electrical distribution systems that could challenge continued steady s te o er ti a a e 1 sa ety s s re it m y be taken for unp anne events ha sa isfy t is SR.

Cp SR 3.8.1.9 Each DG is provided with an engine overspeed trip to prevent damage to the engine. Recovery from the transient caused by the loss of a large load could cause diesel engine overspeed, which, if excessive, might result in a trip of the engine. This Surveillance demonstrates the DG load response characteristics and capability to reject the largest single load without exceeding predetermined frequency and while maintaining a specified margin to the overspeed trip. The load referenced for DG-1 and 2 is the continued The, @eke l5 no% cLpphA+lc. 4) VeAglcAklM c4 ~Anima.l eggy" of 4 M U.ntkpa~cv Su,pplg gvom &c. ptegcwed ofgj$e v'~+

ko 4hc'. AAcvnate oui>< C~vmik, Si~c.e kris evolaki4 docs noh Chub pere'bakims o$ kM eleckv'imt diWib<4&n. sgskems.

WNP-2 B 3.8-21 Revision 5

~ ~

1L

REQUEST FOR AMENDMENT TECHNICALSPECIFICATION SR 3.8.1.8 Typed Version of Technical Specification 3.8.1.8 and Associated Bases

AC Sources Operating 3.8.1 SURVEILLANCE RE(UIREMENTS continued SURVEILLANCE FRE)UENCY SR 3.8.1.7 NOTE All DG starts may be preceded by an engine prelube period.

Verify each required DG starts from standby 184 days condition and achieves:

a. For DG-1 and DG-2 in

) 3910 ( 15 seconds, voltage V and frequency a 58.8 Hz, and after steady state conditions are reached, maintains voltage e 3910 V and a 4400 V and frequency > 58.8 Hz and ~ 61.2 Hz; and

b. For DG-3, in a 15 seconds, voltage a 3740 V and frequency a 58.8 Hz, and after steady state conditions are reached, maintains voltage a 3740 V and a 4400 V and frequency a 58.8 Hz and a 61.2 Hz.

SR 3.8.1.8 NOTE-The automatic transfer function of this Surveillance shall not be performed in MODE 1 or 2. However, credit may be taken for unplanned events that satisfy this SR.

Verify automatic and manual transfer of the 24 months power supply to safety related buses from the startup offsite circuit to the backup offsite circuit.

(continued)

WNP-2 3.8-8 Amendment No. 449

AC Sources Operating B 3.8.1 BASES SURVEILLANCE SR 3.8. 1.6 (continued)

RE(UIREHENTS The Frequency for this SR corresponds to the testing requirements for pumps as contained in the ASME Boiler and Pressure Vessel Code,Section XI (Ref. 17).

SR 3.8.1.8 Transfer of Division 1 and 2 4. 16 kV ESF buses (SM-7 and SH-8) power supply from the startup offsite circuit to the backup offsite circuit demonstrates the OPERABILITY of the alternate circuit distribution network to power the Division 1 and 2 shutdown loads. The 24 month Frequency of the Surveillance is based on engineering judgment taking into consideration the plant conditions required to perform the Surveillance, and is intended to'e consistent with expected fuel cycle lengths. Operating experience has shown that these components usually pass the SR when performed on the 24 month Frequency. Therefore, the Frequency was concluded to be acceptable from a reliability standpoint.

This SR is modified by a Note which applies to verification of the automatic transfer function. The reason for the Note is that, during operation with the reactor critical, performance of this SR could cause perturbations to the electrical distribution systems that could challenge continued steady state operation and, as a result, plant safety systems.

The Note is not applicable to verification of manual transfer of the unit power supply from the preferred offsite circuit to the alternate offsite circuit, since this evolution does not cause perturbations of the electrical distribution systems.

Credit may be taken for unplanned events that satisfy this SR.

SR 3.8.1.9 Each DG is provided with an engine overspeed trip to prevent damage to the engine. Recovery from the transient caused by the loss of a large load could cause diesel engine overspeed, which, if excessive, might result in a trip of the engine. This Surveillance demonstrates the DG load continued WNP-2 B 3.8-21 Revision

4