ML18038A406

Responds to Request for Addl Info on ATWS Review Re Alternate Rod Injection & Recirculation Pump Trip Sys.W/ Seven Oversize Drawings

ML18038A406
Person / Time
Site:	Nine Mile Point
Issue date:	07/06/1988
From:	Terry C NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML17055D987	List: ML17055D986 ML17055D988 ML17055D989 ML17055D990 ML17055D991 ML17055D992 ML17055D993 ML18038A406
References
NMP1L-0281, NMP1L-281, NUDOCS 8807120406
Download: ML18038A406 (72)

Text

, ACCELERATED Dl. BUT(ON DEMONS~~~

REGULAT INFORMATION DISTRIBUTION~STEM (RIDS)

ACCESSION NBR:8807120406 DOC.DATE: 88/07/06 NOTARIZED: NO DOCKET ¹ FACIL:50-220 Nine Mile Point Nuclear Station, Unit 1, Niagara Powe 05000220 AUTH. NAME AUTHOR AFFILIATION TERRYiC.D. Niagara Mohawk Power Corp. C RECIP.NAME RECIPIENT AFFILIATION gZ.

Document Control Branch (Document Control Desk)

SUBJECT:

Responds to request for addi info on ATWS review re alternate rod injection 6 recirculation pump trip sys.

DISTRIBUTION CODE: A055D COPIES RECEIVED:LTR TITLE: OR/Licensing Submittal: Salem ATWS g ENCL Events GL-83-28 t SIZE:

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD1-1 LA 1 0 PD1-1 PD 3 3 BENEDICTgR 1 1 HAUGHEY,M 1 1 I

INTERNAL: ACRS ARM/DAF/LFMB 1 0 NRR LASHER,D NRR/DEST/ESB 8D 1 1 NRR/DEST/ICSB 7 NRR/DEST/PSB 8D 1 0 NRR/DEST/RSB 8E NRR/DLPQ/QAB 10 1 0 NRR/DOEA/GCB 11 Ml .

CT 1 1 OGC 15-B-18 REG FILE 1 1 1 RES/DE/EIB EXTERNAL: LPDR NRC PDR 1 1 NSIC h

TOTAL NUMBER OF COPIES REQUIRED: LTTR 27 ENCL 21

NIAGARAMOHAWKPOWER CORPORATION/301 PLAINFIELDROAD, SYRACUSE, N.Y. 13212/TELEPHONE (315) 474-1511 July 6, 1988 NMP1L 0281 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Re: Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 Gentlemen:

Enclosed is Niagara Mohawk Power Corporation's response to the staff's request for additional information on ATWS review related to Alternate Rod Injection (ARI) and Recirculation Pump Trip (RPT) systems. This information has been provided informally through telephone discussions with the Nuclear Regulatory Commission staff which are documented in this letter. The Nuclear Regulatory Commission questions are contained in Attachment l.

We are providing marked-up copies of the drawings the staff requested since .

all design changes that are documented in Document Change Requests (DCRs) have not yet been incorporated in the drawings identified in Attachment 1. These marked-up drawings also incorporate our recent commitment to delete the three-second time delay in the Recirculation Pump Trip high pressure initiation logic.

Very truly yours, NIAGARA MOHAWK POWER CORPORATION C. D. Terry Vice President Nuclear Engineering and Licensing LW/pns 5126G Enclosures xc: Regional Administrator, Region I Mr. R. A. Capra, Director Mr. R. A. Benedict, Project Manager Mr. W. A. Cook, Resident Inspector Records Management 8807120406 880706 0 5000Z20 Pop ADQCH, pgU P

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E) Jrru/CC /~p rg g)>>C 7Q 1"pp Iulgu ( Z'CeSj ) T jc'/ ) is > up<</u i /i <</ ( / /'rr r/e "/<</r//> 5's" ys /c see; <<. u>> />>cur>M rqrt s >iri g s /i ///suvre w c c C . /I/'u r c /jury 8 err/ cp fiji u //'>>r/> /I/u //P/ c ~/ . r~~ v~-ZV~r/- <~<~ 8~'/ INTERNAL CORRESPONDENCE 7 NlAGARA FORM 112 2 A 0240 56.01-013 N l,l MOHAWK K. B. Thomas DISTRICT TO T. N. Roman DATE September 3, 1986 FILEGQDE SUBJECT RPSMG Set Vol tage Protec t ion Technical Specification 4.6.12b requires that the Reactor Protection System Motor Generator Set voltage protective instruments be set at: over voltage < 132, < 4 seconds under voltage > 108, 4 seconds This setting was selected to ensure that the voltage variation at the RPS components would be held to + 10 percent of 115 volts. I In addition, Niagara Mohawk committed to identify which circuits required modifications to ensure that the GE recommended normal operating voltage of 115 + 2 volts at the RPS components be maintained. (Ref. T. E. Lempges letter to D. B. Vassallo, dated 12/15/83). Licensing does not consider exceeding the recqmmended voltage of 115 + 2 volts to be a reportable event as long as the technical specification requirements and the 115 + 10'/. voltage commitment are met. He should, however, continue to pursue modifications to the RPS circuitry to achieve the GE recommended levels of 115 + 2 volts as soon as possible. P7 $ + Ji'c~ 7t~ rife/ jiP g jj P~,, p / /84 wM IJ I f Jf'J J' K. B. Thomas Licensing Engineer KBT:saa 7063I xc: H.. T. Barrett P. E. Francisco ~3. J. Finrgr,='ty~ geo eye'-nAJ I/-/ver zo 2AO-113 Technical Information January 1976 SPEC 200 RELAY CONTACT OUTPUT ISOLATOR GENERAL Relay type SPEC 200'ontact Output Isolators pro-vide an interface between low level dc system logic sig-nals and high level load switching circuits, In addition to the spdt relay contact output isolators described herein, two versions of solid-state contact output isolators are covered in Technical Information Sheet 2AO-110. ,i~cT jc t, ~ 'I ~ 'Ihe spdt relay contact output isolator, shown in Figure 1, mounts directly in a SPEC 200 nest. It occupies two spaces in the nest. This unit can accept )," -4404 g up to four inputs, and provides isolated spdtirelay con-tacts for each. There is no electrical isola/on between the inputs. SPECIFICATIONS Model Number: 2AO-L2C-R Mounting: Refer to TI 200-275 NOTE) yrotecttre corer Ior the loner tyclre terminate {re)oared Ior dally) moat he attached when Electrical Classification: Ordinary locations drcolta ae alice Intrinsic Safety: See TI 200-255 Power Requirements: Figure 1. spdt Relay Type Contact Output Isolator +15 V dc a5/o, 40 mA maximum, per relay i I Input Signal(s): + l5 V I High: 10 V minimum from 550 ohms minimum LOAO A source impedance Lows 0.5 V maximum from 50 ohms maximum I source impedance J Input Resistance; 500 ohms nominal (dc) I Voltage Drop Across Output Terminals: ~l I~ LOAD 8 Less than 0.5 ohms at rated load INPUT B I J Output: spdt relay contacts g I Output Load (maxim'um, resistive): I o +120 Vac: 5A ~;, ~- " LOAO C 230 Vacs 2A 28 V des 5A INPUT C I I 40 Vdc: 1A L J 125 V'dcs 0.5A 1 r I Supply Voltage Effect: No error within normal operating limits LOAO O + I ~I Ambient Temperature Range: 5 to 50'C (40 to 120'F) INPUT O Ambient Temperature Effect: Figure 2. Circuit Schematic No error within normal operating range - Response Time: 10 PRINCIPLE OF OPERATION milliseconds typical relay is connected in series with the power supply and associated input. When the resistance of the logic source is high, the relay is de-enetgized. When it is Figure 2 is a schematic of the spdt relay contact low, the relay is energized. Diodes across the relays output isolator. The relays are powered from the+15 reduce the effects of inductance at the time of switching. volts dc bus-bar in the SPEC 200 nest, In each case a OX&OR ~ ~ I C$ . ~ ~ ~ I ry control /ML/TR relays Operate Time (Series ML only) Coil Operating Voltage Time elapsed between energization and Series GP opening of closed contacts. 12 milliseconds max. when DC 50/60 Hz latching pulse duration is: Nominal Coil Voltage 12 24 48 125 250 24 48 I 120 ~ 220 AC 80 milliseconds , Minimum Pick.up voltage at 40'C 9.5 19 38 100 200 20 41 102 188 DC 25 milliseconds Maximum voltage for 6 milliseconds max. when continuous use 13.5 27 53 143 275 27 53 137 245 unlatching pulse duration is: AC 40 milliseconds For 380 vo! ts AC DC 20 milliseconds Use 6800 ohms 4 watt resistor in series with 220 volts AC relay Transient Protection (Series TR only) A 1500 volt transient of less than 100 micro. For 440 volts AC seconds, or 1000 volts of less than 1 millisec- Use 8200 ohms 6 watt resistor in ond will not affect timing accuracy. series with 220 volts AC relay. Contacts Coil dropout voltages are between 10% and Number of contacts 40% of the rated operating voltages for both 4 single pole double throw DC and AC (Fol example: in a 120V unit Nominal rating dropout will occur between 12 and 48 volts.) 10A 120 volts AC DC relays will function with unfiltered DC (Series GP & TR) from a full.wavtt bridge rectifier. Typical pressure between moving contact and Normally closed contact: Series ML ( b 15%) 30 grams Normally open contact: Nominal Pickup Drop out 100 grams Voltage DC ohms Current (mA) DC ohms Current (mA) (Series ML) Code pressure between moving contact and Letter AC ally closed contact: . 100 grams G 24 15 625 83 250 Normally open contact: H 48 86 312 286 125 Min. 100 grams 120 370 125 1470 50 Contact resistance measured at terminals 220 1500 68 5800 28 250 milliohms O125V DC, 1 amp with without with without with without with without DC R-C R.C R-C R-C R-C R-C R-C R-C Life Load life - see chart page 18. 12 71 9 169 1333 72 10 168 1200 Mechanical life -100 million operations. 24 275 35 87 686 285 44.5 84 540 (Series GP & TR) 48 1132 132 42 364 1178 178 41 270 10 million mechanical operations (Series ML) D 125 7220 1020 18.2 122 7130 930 17.5 134 Series TR (-100b +15oio) DC AC 24 VDC . 120V 50-60 Hz 125 VDC Power Consumption SERIES GP SERIES ML SERIES TR Typical power consumption at rated AC: 7.5W for pick.up Typical power consumption at rated voltage is: 3W for dropout voltage is: 6VA for AC coils 6VA for AC coils 6 Watts for DC coils. DC: without R/C network 6 Watts for DC coils There is no surge current during 15W for pick.up operation. 13W lor dropout DC: with R/C network 2W for pick-up 2W for dropout l 0 /5 r'co y~ rf'PS j/- Pyre'g series P/ML/T.R,..."I".y": Load Life Characteristics, Power Factor Number of Cvnenl w AMP$ Current or Electrical 0.3 05 1 2.5 5 7.5 10 Voltag~ (Am ps) Time Constant Operations Remarks C 30 I 540V AC COS Ip ~ 0.5 15 000 2 contacts in series $ 20 380V AC 15 Resistive 10 000 2 contacts in parallel ~ \ 5I 380V AC 10 Resistive "- io 380V AC 3 x 3.3 COS (p 0.8 3hp motor 220V AC 20 Resistive 20 000 2 contacts in parallel 5 220V AC 15 COS (p 0.5 20 000 2 contacts in parallel ? 220V AC 10 Resistive 400 000 2.5 220V AC 3x6 COSIp ~ 0.8 200 000 3hp motor 220V AC 1 500 000 Filament lamps 120V 220V AC Resistive 3 000 000 50ieoHt \ ziVOC 220V AC 2.5 COS ip ~ 0.25 2 000 000 ~ 0.5 125V 125V 2tov 2tov 220V AC Resistive 15 000 000 oc oc 50i50 50/50 220V AC Resistive <<~~>> Ht Ht 1.25 30 000 000 Induetwe ResisINe 120V D 1.5 Resistive 20 000 000 with blowout device 48V DC 10 Resistive 1 000 000 insulation Resistance 48V DC 1.5 5 ms 18 000 000 Between all no+connected terminals as well as betwetfn noneonnected terminals and the relay yoke: 1000 megohms at 500 volts DC. Shock (Series GP only) Agency Approvals The relay, when kept energized by means of UL Recognized, CSA Ofefectric (Series GP & ML) one of its own contact sets, will withstand Certified (Series GP & ML only) volts RMS 60 Hz between points 40g shock load when operating on DC, and Weight ecified above. 150g shock load on AC. ielectric (Series TR) Relay complete with cover: Vibration (Series GP only) 103 oi. Net (Series GP & ML) 2000 VAC between terminals and case and Single axis fragility curve data are available 11 oz. Net (Series TR) between mutually. isolated contacts. on request at frequencies from 5 Hz to 33 Hz. Operating Temperature Range Mounting/Terminals O'C to 60'C (Series GP & ML) O'C to 50'C (Series TR) 16 flat base pins. Screw terminal sockets are available. Dimensions nc es mm 1.77 t5 1.35 ORDERING INFORMATION Q Catalog Number Code/Series GP and ML 1.83 t9 30 IN Model Series COII Voltage Options 4.64 lie A - 12VDC N- Magnetic 8fnwout Device AGASTAT'eries GP - Power Relay 8- 24VDC Q- Ught to indicate coil AGASTAT1 C - 48VDC 0nergizatfon a aia e Series ML - Magnetic Latch D - f25 VDC (Not avaifabf0 on aff models. Relay F - 250 VDC consult factory) G- 24V60Hz R- fntemaf diode to suppress H- 48V60Hz coil d00neigizati0n transient . I - 120 V 60 Hz (When used on DC unit, J - 220 V 60 Hz relay release time increases to the same value as the AC equivalent.) 'P Series Only See pages 20 and 21 for sockets 2nd other acc0550Iios. t gs ~ erfd - A'PS (/ - ger /8 NOTES OF TELEPHONE CONVERSATION ~e ~ CALL DATE /s-- 6' TIME /'4 -'~ PROJECT + 7 M4 M.O. /'Z' m FROM: TO: NAME Sar Z~~ a /dc'~ W/ec . TITLE I) gi'/'~7/a'tpt g rIr /r/go'~ /+oac H< e ~ N /eC ADDRESS g( e Pvr P >H o~ lr-g 4I+/N' I 9o 5' 6 d z - WE /I SUBJECT 48 gpo r~ ec4 ~(. 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FOR 2/C (CLASS B STRAND) 600 VOLT FIREWALL III CABLES (COLUMN "B" WALLS)

Size AWG Wall R90 L (60 Hz) 25 1000'C-DC Ratio mhenries er Ohms er per 1000' Ohms 1000'4

.030 2. 73 3.41 l. 00 .093 .035 12 .030 l. 72 2. 15 . 1.00 .0878 .033 10 .030 1.08 l. 35 1.00 .0827 .031 8 .045 .679 .849 1.00 .0865 .033 6 .045 .428 ~ 535 1.00 .0815 .031 4 ~ 045 .269 .336 1.00 .0772 .

029'028 2 .045 . 169 .211 1.00 .0736 1 .055 . 134 .168 1.00 .0747 .028 0 .055 . 106 . 132 1.00 .073 .028 00 .055 .0842 . 105 1.00 .0715 .027 000 .055 .0668 .0835 l. 00 .0701 .026 0000 .055 .0525 .0656 l. 00 .0688 .026 250 ~ 065 .0449 .0561 1.005 .0697 .026 300 .065 .0374 .0468 1.006 .0687 .026

'350 .065 .0320 .0400 1.009 .0679 .026 400 .065 .0277 .0346 1.011 .0673 .025 450 .065 . 0247. .0309 l. 014 .0674 .025 500 .065 .0222 .0278 1. 018 .0663 .025 NOTES:

1) R25 and R90 The single conductor resistance at 25 0 C and 90 0 C respectively.

Dou~le the values for total resistance.

2) AC-DC Ratio - The ratio of the resistance at 60 Hz to the DC resistance.

The factor includes correction for both skin and proximity effect. It is correct for cable in air or non-magnetic duct.

3) L - The inductance in millihenries per thousand feet for one conductor.

Double the values for total inductance.

4) X The. inductive reactance in ohms per thousand feet at 60 Hz for one conductor. ~o b~e the values for total reactance.

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Dear Mr. Skow:

r I

In response to your questions on my letter dated April 12, 1978 to Mr. Whitford in reference to resistance and inductance for values of conductor resistance (at 25 C and 90 C), AC-DC resistance ratio (60Hz), inductance and inductive reactance (60Hz) for Firewall III cables in air or non-magnetic conduit. The values for inductance

@ apply to either 2 conductor jacketed cable, or duplexed conductors.

For close random lay in a tray or conduit (two separate conductors),

the values for inductance and inductive reactance should be increased by 208. (Resistance and AC-DC ratio will remain the same). The values for column "A" walls will be slightly higher for cabled or duplexed constructions, but will be about the same for random lay (plus 20%) .

If you have any questions, please contact me.

I Very truly yours, THE ROCKBESTOS COMPANY ill3. ~cM~c-Patterson Distrr Sales Manager WJP/lmr Encl.

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" RESISTANCE, .INDUCTANCE, AND INDUCTIVE REACTANCE (60 Hz)

FOR 2/C (CLASS B STRAND) 600 VOLT FIREWALL III CABLES (COLUMN "B" WALLS)

Size AWG R25 L (6O Hz) 1000'C-DC9O Ratio mhenries er Ohms er per 1000' Ohms 1000 14 . 030 2.73 3. 41 1. 00 .093 .035 12 .030 l. 72 2. 15 1.00 .0878 .033 10 .030 1.08 l. 35 l. 00 .0827 .031 8 .o45 .679 .849 1.00 .0865 .033

~

6 .045 ~428~ :535 1.00 .0815 .031 4 .045 .269 ..336 1.00 .0772 .029 2 .045 . 169 ..211 1'. 00 .0736. .028 1 .055 . 134 . 168 l. 00 .0747 .028 0 .055 . 106 . 132 1.00 .073 .028

'00 .055 . 0842 105 1.00 .0715 .027 000 .055 .0668 .P835 1.00 .0701 .026 0000 .055. .0525 .i0656 l. 00 .0688 .026 250 .065 . 0449: .0561 1. 005 .0697 .026 300 .065 .0374 .b468 1.006 .0687 .026 350 .065 .0320 .0400 1.009 .0679 .026 400 .065 .0277 .0346 1.011 .0673 .025 450 .065 .0247 ;0309 1.014 .0674 ~ 025 500 .065 .0222 .0278 1.018 .0663 .025 I) R25 and R9 0

- The single conductor resistance at 25 0C and 0 90 C respectively.

Doyle the values for total resistance.

2) AC-DC Ratio - The ratio 'of the resistance at 60 Hz to the DC resistance.

The factor includes correction for both skin and proximity effect. It is correct for .cable in air or non-magnetic duct.

3) L The inductance in millihenries per thousand feet for one conductor.

Double the values for total inductance.

4) X L

- The inductive reactance in ohms per thousand feet at 60 Hz for one conductor: QoOlge the values for total reactance.

> ~~~i<~~>

/ n'~i'v~'ls, c) r ~vs cue'r nota- Vrti~~4 Mire Q~~'~a'g /pe 4 ~y gi/~~/ ~are'd~droa Zo .

. THE ROCKBESTOS GUARANTYBANK BLOG.

COMPANY 19 WEST MA(N STREET Y/ESTBORO, MA. 01581

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