ML20217E841

Forwards Info Provided by Ies Utilities Inc Re Improved TS

ML20217E841
Person / Time
Site:	Duane Arnold
Issue date:	10/01/1997
From:	Kelly G NRC (Affiliation Not Assigned)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TAC-M97197, NUDOCS 9710070244
Download: ML20217E841 (9)

Text

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p j-UNITED STATES

• NUCLEAR REGULATORY COMMISSION WASHINGToH, D.C. 2066H001

• ess* l October 1,1997 NOTE TO: Information and Records Management Branch Office ofInformation Resources Management FROM: Glenn B. Kelly, Senior Project Manager Project Directorate 3-3, DRPW, NRR f/ ['

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SUBJECT:

INFORMATION TO BE PLACED ON THE DUANE ARNOLD ENERGY CENTER (DAEC) DOCKET (50-331)

The enclosed information was provided to me by IES Utilities Inc., employees during discussions we had regarding the Improved Technical Specifications (M97197) submittal Please place the enclosed information on the DAEC docket, l

t 3 k cc: Public Document Room '

PD33 reading file 9710070244 971001 PDR P

ADOCK 05000331 PDR 11 !!illi,II,II,Ill, ll &#HlECETER68Py

i 200 Mest Street 3.E.

P.O. Son 35f CentstRapMs M $2406 l

INDUSTRIES Fax Cover Sheet To: Glenn Kelly company: U.S.NRC Far Number: (301) 415 -3061 l

I From: Tony Browning Phone Number: (319) 851 -7750 lES Fax Number (319) 851- 6132 Number of pages following this page: 3 Date/ time: October 1,1997/8:08 AM Glenn, Per our telecon this AM, attached are the revised pages for the CTS-to-TTS "setpoint " bridge" document which addresses the Degraded Voltage and Loss-of Voltage setpoints.

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• Pais,M 32324 unupES Memorandum l

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t TonyBrosming NG-97-1559 TO:

FROM EricChristopher G6 DATE: August 28,1997 RE: Bridge Document SUBECT: Degraded Voltage and Loss of Voltage AVs FILE: A 351 Pleasu find attached rcplacement pages to the Bridge for Degradei Vohage and Loss of Voltage.

Upper Allowable Values have been established for the Degraded Vohage and Ims of Voltat" settings, per serpoint calculations CAbE95 006 and CAbE93 005. A lower AV was also added to the Degmded Voltage timer.

cc: w/o

Attachment:

M. Huting, J. Ertman, K. Putnam, DOCU 4

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Bridge Data Sheets n.us.n

Description:

4.16 KV Emergency Bus Undervoltage (Loss of Voltage) . Load Shed IT5: 3.3.8.11.1.s ITS AV >=595 volts I

<=2275 volu p  : .-- -

CTS: Table 3.2 3 CTS Value: 20 <= V e= 21 volu CTSType: NominalSettinS CTSTypeRef: DAEC Setpoint P econstitution Project, Historical In-plant Usage

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Calculation: CAL.E93 005 Celes:>rtPti LNTSPLER.UAL Cal StartPIRef See Key Notes, l NG.961196 Calc $eq: LNTSPLER >LAV ColcSeqRef: GE Setpoint Methodology LAV.>LAL VAL.>UAV UAL.>UNTSP CaleNeyNotes: 1. De LAL was determined in the cale to be o volts. However, to account for stroy voltages across the Potential Transformer the AL was conservatively back calculated kom the LWTSPLER, which was assumed to be the lower value of the range in the CTS.

2. The UAL is chosen to avoid conflict with the sequential loading relays.

62

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Bridge Data Sheets 29.hr.n

Description:

4.16 KV Emergvocy Dus Degraded Voltage . Start Clese10enerator ITS: 3.3.6.11.2.s ITS AV >=3780 volts <=3899 volts 3.3.8.11.2.b >=7.92 see <=8.$ see

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CTS: Table 3.2. D CTS Value: 108 <= V <= 111 volts 8.0 <= t <= 8.5 see CTSType Nominal Setting CTSTypeRefi DAEC Serpoint Reconstitution Project, UFSAR Description,IUstorical In. plant Usage

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CalcStartPtReft See CalcKryNotes.

Calculation: CAL.E95 006 CaleStartPt LAL and UAL No.961196 NO.951432 Caleseq: LAL.>LAV CalcSeqRef: GE Setpoint Methodology LAL.>LNTSP UNTSP.>UAL UAL.>UNTSP CalcKeyNotes: 1. The LAL is considered to be the minimum pennissible voltage for the safety related loads to perfonn thei function plus the worst case voltage drop from the 4160 volt essential buss to the 480 volt Motor Contro per At UFSAR.This will ensure enough voltage for the safety related loads to perfonn their function.

2. The UAL and UAV were determined based on the current UNT!.P of li t volu.

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63

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unupEs Memorandum TO:

• Tony Browning NG 971559 FROM: EricChristopher @hh DATE: August 28,1997 RE: Bridee Docurnent

SUBJECT:

Degraded Voltage and Loss ofVoltage AVs FILE: A-351 Please fmd attached replacement pages to the Bridge for Degraded Voltage and less of Voltage.

Upper Allowable Values have been established for the Degraded Voltage and Loss of Voltage settings, per setpoint calculations CAL-E95 006 and CAL-E93 005. A lower AV was also added to the Degraded Voltage timer, cc: w/o

Attachment:

M. Huting, J. Ertman, K. Putnam, DOCU

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200 F6sf $tmet S E.

P.C. San 351 Cedar Mores, IA 52406 INDUSTRIES Fax Cover Sheet To: Olenn Kelly company: U.S.NRC Far Number: (301) 415 - 3061 4

From: Tony Browning Phone Number: (319) 851 - 7750

1. ES Far Number (319) 851- 6132 Number of pages following this page: 3 Datattime: October 1,1997/ 8:08 AM Glenn, Per our telecon this AM, attached are the twvised pages D a the CTS-to4TS "setpoint " bridge" document which addresses the Degraded Voltage and Loss-of Voltage setpoints.

Tony i

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Bridge Data Shee^J n.c s.p7

Description:

4.16 KV Emergency Bus Undervoltage (Loss of Voltage) . Load Shed ITS: 3.3.5.11.l.a ITS AY: >=$93 volts

• 2275 volts

- - . p. - -.. . .. .

CTS: Table 3.2 8 CTS Valn 20

• V

• 28 vohs CTSType NominalSetting CTSTypeRef: DAEC Setpoint Reconstitution Project, Historical in plant Usage z....

Calculation: CAL.E93 005 CaleStartPt LNTSPLER,UAL CalcStartPtRat: Su Key Notw.

NO.9C 1196 Calc $eq: LNTSPLER.> LAY Calc 5eqRat: GE Setpoint Methodology LAV.>LAL i

l UALOUAV UAL.>UNTSP 1

I CalcKeyNotes: 1.The LAL was datannined in the cale to be 0 volts. However, to account for strty voltages across the Potential Transfonner the AL was conswvatively back. calculated from the LNTSPLER, which was assumed to be the lower value of the range in the CTS.

2. The UAL is chosen to svold conflict with the sequential loading relays.

62

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Crldge D:t3 Shee'3 n.us.n Descriptient 4.16 KV Emergency Bus Degraded Vohage . Start Diesel Generecor __

ITS: 3.3.8.11.2.a ITS AY: >-3780 volts o3199 volts 3.3.8.11.2.b >=7.92 sec <=B.5 ue

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CTS: Table 3.2. B CTS Value: 108 o V o 111 volts 8.0 o t o 8.5 sec CTSType: Nominal Setting CTSTypeRef: D AEC Serpoint Reconstitution Project. UFSAR Description, Historical In. plant Usage

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. . - . . . . . . . - - . . . - - . . - - - - - - . ~ . - - - - - -

CaleStartPt: LAland UAL CalcStartPtRef: See CalcKeyNotes, Calculattos: CAL.E95 006 t NO.961196 NG 931432 l

CakSeq: LAle>LAV CalcSeqRef: OE Setpoint Methodology LAL >LNTSP UNTSP.>UAL UAL.>UNTSP l CalcKeyNetes: 1. ne LAL is considered to be the minimum permissible voltage for the safety related loads to perform their function plus the worst case voltage drop from the 4160 volt essentist buss to the 480 vot' Motor Control Centers, per the UFSAR. n(s will ensure enough voltage for the ufety related loads to perfortn their function.

2. ne UAL and UAV were determined based on the current UNTSP of 111 volts.

63

- - - - - - - - - . _ _ _ _ _ _ _ . _ _ _ ._