TXX-4514, Forwards Table of Parameters on SPDS Displays,Per 850625-26 Audit Request

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Forwards Table of Parameters on SPDS Displays,Per 850625-26 Audit Request
ML20128K993
Person / Time
Site: Comanche Peak  
Issue date: 07/19/1985
From: Counsil W
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To: Noonan V
NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
References
TXX-4514, NUDOCS 8507240266
Download: ML20128K993 (6)
v • d • e


Text

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TEXAS UTILITIES GENERATING COMPANY L g # TXX-4514 File #

10 surwar u,wun..oo xOnn Ouve rnm. i..n..n uru.4*.ux4,. neo, July 19, 1985 g

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2 Director of Nuclear Reactor Regulation a

Attention: Mr. Vince S. Noonan, Director i

A Comanche Peak Project Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.

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SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION DOCKET N05. 50-445 AND 50-446 SPDS PARAMETER CONVENTIONS m

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Dear Mr. Noonan:

I Attached is the table of parameters on the SPDS displays as requesi.ad y

by your staff during the June 25 and 26,1985, audit of the SPDS at Comanche Peak Steam Electric Station.

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Sincerely,

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W. G. Counsil I

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PAR /. METER NAME METHOD OF DETERMINATION DISPLAYS.

NOTE

- AUCT HI TAVE HIGHEST VALUE OF 4 LOCP'S TAVE; WHERE EACH LOOP'S TAVE MESSAGE AREA HIGHEST OF CALCULATED TAVE IS 15 DETERMINED BY CLt +.312 N16 Powerg FOR > ISE PWR.

PRESS TEMP (TREND)

DISPLAYED.

.,s IF PWR IS <15% THEN TAVE IS DETERMINED BY.

ICL(1) + EHL (j) 2(1 + j)

COLO LEG TEMPERATURE ONE WIDE RANGE SENSOR FOR EACH LOOP NORM SINGLE INPUT CRITERIA USED.

(CL)

HU/CD LOOP TR 1 & 2 (TREND)

LOOP TR 3 & 4 (TREND)

AUCT HI TAVE (INDIRECT)

CONDENSER OFF GAS ONE SENSOR RAD MON (TREND)

SUSPECT, BAD or GOOD INDICATION RADIATION SGTR (AIDS) determined by RM-11 and Range SEC RAD TARGET (INDIRECT) checking CONTAINMENT HUMIDITY PV = P(2) - (PRESS-P(2))(T-TWB)

LOCA (AIDS)

CALCULATED HUMIDITY. If CNTMT 2800 - TWB SGTR (AIDS)

TEMP or PRESS are SUSPECT, then LOSC (AIDS)

SUSPECT VALIDITY shown 1 RH = 100

  • PV /P(1) WHERE LVL PRESS (TREND)

P(1) = SATURATION PRESSURE AT CONTAINMENT TEMP CNTMT ATMOS TARGET (INDIRECT)

P(2) = SATURATION PRES $URE AT DEW POINT TEMP PRESS = CONTAINMENT PRESSURE PARAMETER T = CONTA!hMENT TEMPERATURE PARAMETER TWB = DEWPOINT TEMPERATURE CONTAINMENT PRES $URE AVERAGE OF FOUR NARROW RANGE SENSORS LOCA (AIDS)

USES > 3 CRITERIA SGTR (AIDS)

~

LOSC (AIDS)

LVL PRESS (TREND)

HUMIDITY (INDIRECT)

CNTMT ATMOS TARGET (INDIRECT)

CONTAINMENT RADIATION AVERAGE OF TWO WIDE RANGE SENSORS NORM HU/CD LOCA (AIDS)

USES 2 INPUT CRITERIA LVL PRESS (TREND)

CONTAINMENT SUMP LEVEL ONE SENSOR SUMP (TREND)

USES SINGLE INPUT CRITERIA CONTAINMENT THE AVERAGE OF 5 SENSORS LOCA (AIDS)

CNTMT TEMP USES > 3 CRITERIA TEMPERATURE SGTR (AIDS)

~

LOSC (AIDS)

H2 HUMID (TREND)

CNTMT ATMOS TARGET (INDIRECT)

HUMIDITY (INDIRECT) 6 Mer. _

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PARAMETER NAME METHOD OF DETERMINATION

. DISPLAYS NOTE CONTAINMENT WATER

  • THE AVERAGE OF 2 SENSORS LOCA (AIDS)

LEVEL SGTR (AIDS)

USES 2 INPUT CRITERIA LOSC (AIDS)

TK LVL (TREND)

LVL PRESS (TREND)

CNTMT ATMOS TARGET (INDIRECT)

CORE EXIT TEMPERATURE THE HIGHEST VALUE OF THE PARAMETER LABELED HOTTEST TC NORM DATA VALIDATION DETERMINED BY

~

FROM EITHER CCM-A OR CCM-B. THE HIGHEST OF TWO HU/CD CORE COOLING MONjTOR AND RANGE PARAMETERS RECEIVED FROM CORE COOLING MONITOR CLD SHt'TDN CHECKING ICC (AIDS)

RCS (TREND)

CORE CLG (TREND)

CONDENSATE STORAGE THE AVERAGE OF TWO SENSORS TK LVL (TREND)

USES 2 INPUT CRITERIA TANK LEVEL DEWPOINT TEMPERATURE THE AVERAGE OF 5 DISTRIBUTED SENSORS

' HUMIDITY (INDIRECT)

USES > 3 CRITERIA-FEEDWATER ISOLATION ISOLATED IF EITHER OF TWO SENSORS INDICATE ISOLATION MESSAGE AREA SEE EVENT MESSAGE NOTE ALL TRENDS (TREND TICKS)

HYDR 0 GEN CONCENTRATION THE AVERAGE OF 2 SENSORS H2 HUMID (TREND)^ ~

USES 2 INPUT CRITERIA HOT LEG TEMPERATURE ONE WIDE RANGE SENSOR FOR EACH LOOP LOOP TR 1 & 2 (TREND)

SINGLE INPUT CRITERIA LOOP TR 3 & 4 (TREND)

INTERMEDIATE RANGE AVERAGE OF TWO SENSORS NIS (TREND)

POWER -

SUBCRITICALITY (CSFM)

USES 2 INPUT CRITERIA POWER (INDIRECT)

(MESSAGE AREA)

INTERMEDIATE AVERAGE OF TWO SENSORS PESSAGE AREA USES 2 INPUT CRITERIA MAIN STEAMLINE ISOLATED IF EITHER OF TWO SENSORS INDICATE ISOLATION MESSAGE AREA SEE EVENT MESSAGE NOTE ISOLATION ALL TRENDS (TREND TICKS)

MAIN STEAMLINE THE HIGHEST Vs4UE OF 4 LOOP'S MAIN STEAMLINE RADIATION SGTR (AIDS)

DATA VALIDATION DETERMINED BY RADIATION RAD MON (TREND)

RM-11 & Range Checking SEC RAD TARGET (INDIRECT)

POWER POWER = POWER RANGE IF SENSORS ARE GOOD AND POWER MESSAGE AREA CACULATION, USES PWR IPPUT AS (MESSAGE AREA)

GREATER THAN 11 EXPLAINED POWER = SOURCE RANGE IF SR HI VOLT IS ON AND SR FLUX IS GOOD POWER = INTERMEDIATE RANGE IN ALL OTHER CASES POWER RANGE POWER THE AVERAGE OF 4 NIS POWER RANGE POWER SENSORS NIS (TREND)

USES > 3 CRITERIA POWER (INDIRECT)

(MESSAGE AREA)

PRESSURE RELIEF ONE SENSOR LOCA (AIDS)

USES SINGLE INPUT CRITERIA TANK PRESSURE r

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PARAMETER NAME METHOD OF DETERMINATION DISPLAYS NOTE PRESSURIZER LEVEL THE AVERAGE OF THREE SENSORS NORM USES > 3 CRITERIA HU/CD

~

LOCA (AIDS)

SGTR (AIDS)

LOSC (AIDS)

RCS (TREND).

PRESSURIZER PORV ANY ONE OF THE TWO PORVS OPEN, OPEN WILL BE DISPLAYED, LOCA (AIDS)

If PORV indication contradict POSITION OTHERWISE CLOSED WILL BE DISPLAYED each other, open displayed as SUSPECT PRZR SAFETY VALVE ANY ONE OF THE THREE SAFETY VALVES OPEN, OPEN WILL BE LOCA (AIDS)

If any valve contradicts each DISPLAYED, OTHERWISE CLOSED WILL BE DISPLAYED other, open display is suspect.

RCP STATUS EACH PUMP'S STATUS WILL BE DISPLAYED AS ON OR OFF ICC (AIDS)

ONE CONTACT FOR EACH PUMP

^

RCS PRESSURE THE AVERAGE OF TWO NR SENSORS IF THE AVERAGE IS BETWEEN NORM USES TWO INPUT CRITERIA FOR 1716 & 24B4 PSIG, OTHERWISE THE AVERAGE OF TWO WIDE HU/CD PARAMETER. WHICH PARAMETER RANGE SENSORS IS DISPLAYED CLD SHTDN DISPLAYED IS DEPENDENT ON LOCA (AIDS)

CURRENT CONDITION.

SGTR (AIDS)

RCS (TREND)

.s PRESS TEMP (TREND)

RHR FLOW A&B ONE SENSOR FOR EACH TRAIN CLD SHTDN SINGLE INPUT CRITERIA RH" HX INLET ONE SENSOR FOR EACH TRAIN CLD SHTDN SINGLE INPUT CRITERIA TEMP A & B RHR HX OUTLET ONE SENSOR FOR EACH TRAIN CLD SHTDN SINGLE INPUT CRITERIA TEMP A & B RX LVL TBD WILL BE DETERMINED WHEN RVLIS INTERFACE IS NORM Data received from RVLIS IMPLEMENTED HU/CD computer. Validation of CLD SHTDN parameter determined by RVLIS.

ICC (AIDS)

Range Checking performed.

RCS (TREND)

REACTOR WATER STORAGE THE AVERAGE OF FOUR SENSORS TANK LVL (TREND)

USES > 3 CRITERIA TANK LEVEL RX TRIP TRIPPED IF EITHER OF TWO SENSORS INDICATE TRIP MESSAGE AREA SEE EVENT MESSAGE NOTE ALL-TRENDS (TREND TICKS)

STEAM FLOW DIFFERENCE IN LBS/HR OF SG STEAM FLOW AND SG FEED LOSC (AIDS)

IF SUSPECT PARAMETER USED, FEED FLOW MISMATCH FLOW FOR EACH LOOP SUSPECT DISPLAY CONVENTION USED.

SG AUX FEED FLOW THE AVERAGE OF TWO SENSORS FOR EACH LOOP SGTR (AIDS)

AFW DETERMINED BY TWO INPUT AFW FLO (TREND)

CRI?fRIA SG BLOWDOWN RADIATION ONE SENSOR RAD MON (TREND)

RM-Il determines validity.

SGTR (AIDS)

Range checking performed.

SEC RAD TARGET (INDIRECT)

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PARAMETER NAME METHOD OF DETERMINATION DISPLAYS NOTE STEAM GENERATOR THE AVERAGE OF FOUR SENSORS FOR EACH LOOP NOPM SG LVL USES > 3 INPUT CRITERIA -

LEVEL (NR) LOOPS 1-4 HU/CD SGTR (ALL-HIGHEST) (AIDS)

LOSC (AIDS)

ICC (AIDS)

NR LVL (TREND)

STEAM GENERATOR ONE SENSOR FOR EACH LOOP WR LVL (TREND)

SINGLE INPUT CRITERIA LEVEL (WR) LOOPS 1-4 STEAM GENERATOR THE AVERAGE OF 3 SENSORS FOR EACH LOOP NORM USES > 3 CRITERIA PRESSURE LOOPS 1-4 HU/CD

~

LOSC (ALL-LOWEST) (AIDS)

PRESS (TREND)

STEAM GENERATOR ONE SENSOR FOR EACH LOOP STM FLOW (TREND)

SINGLE INPUT CRITERIA STEAM FLOW LOOPS I-4' SI ACTUATION ACTUATED IF E!THER OF TWO SENSORS INDICATE ACTUATED MESSAGE AREA SEE EVENT MESSAGE NOTE ALL TRENDS (TREND TICKS)

~

SOURCE RANGE POWER CLD SHTDN: EACH SOURCE RANGE IS DISPLAYED SEPARATELY CLD SHTDN CLD SHTDN USES SINGLE INPUT CRITERIA ICC

THE AVERAGE OF THE TWO SOURCE RANGE SENSORS ICC (AIDS)

ICC USES TWO INPUT CRITERIA IS DISPLAYED IF THE SR HI VOLTAGE IS'ON, NIS (TREND)

OTHERWISE OFF IS DISPLAYED NIS

THE AVERAGE OF TWO SENSORS NIS USES 2 INPUT CRITERIA SOURCE RANGE HI SR HI VOLTAGE IS ASSUMED TO BE ON IF EITHER OF THE MESSAGE AREA VOLTAGE SENSORS INDICATES ON. THIS PARAMETER IS USED ONLY ICC.l AIDS)

DIGITAL INDICATION NOT INDIRECTLY IN THE SR POWER ON ICC (AIDS) AND IN THE ACTUAL:Y DISPLAYED BUT USED IN DETERMINATION OF POWER IN THE MESSAGE AREA.

ALGORITHMS FOR POWER SUBC00 LING THE HIGHEST VALUE OF THE TWO CALCULATED PARAMETERS NORM IF EITHER OF THE PARAMETERS ARE LABELED " MARGIN OF SATURATION" FROM CCHA & CCMg HU/CD SUSPECT, CONVENTION FOR DISPLAY CORE COOLING (CSFM)

IS SUSPECT. VALIDATION IS CORE COOLING (TREND)

DETERMINED BY CCM AND RANGE RCS (TREND)

CHECKING.

CONTAINMENT TARGET TURNS RED IF ANY OF THE FOLLOWING PARAMETERS NORM ATMOSPHERIC EXCEED THEIR SETPOINTS:

HU/CD IF ANY OF THC PARAMETERS ARE TARGET (1) CONTAINMENT TEMP 1

UNAVAILABLE, THE TARGET WILL BE (2) CONTAINMENT PRESS 1

ENCLOSED WITH SUSPECT INDICATION (3) CONTAINMENT HUMIDITY (4) CONTAINMENT H O LEVEL 2

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PARAMETER NAME

~ METHOD OF DETERMINATION DISPLAYS NOTE' 4 f,.

C SECONDARY RADIATION-TARGET TURNS RED IF ANY OF THE FOLLOWING PARAETERS -

NORM

. TARGET EXCEED THEIR SETPOINTS:

HU/CD SAME AS CONTAINENT ATMDSPHERIC e

- (1) MAIN STEAM LINE RADIATION TARGET (2). STEAM GENERATOR BLOWDOWN RADIATION -

(3) CONDENSER OFF GAS RADIATION.

Note: The event message parameters (RK TP, MSL ISO, FW ISO, SI ACT) displayed in the message area are displayed with' time /date and a good.

validation convention if both inputs have occurred within 5 seconds of each other. It is displayed with a suspect convention if the inputs do not occur within 5 seconds of each other.or if the inputs are in opposite states.

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