Text

Revised Pages to Crdr Criteria Rept
	ML20207D250
Person / Time
Site:	South Texas
Issue date:	12/22/1986
From:	; HOUSTON LIGHTING & POWER CO.
To:	;
Shared Package
ML20207D201	List: ML20207D250; ML20207D283; ST-HL-AE-1860, Forwards 861222 Rev to Crdr Criteria Rept & Rev 0 to Crdr Emergency Operating Procedures Validation Rept, Updating Status of Facility Crdr Programs in Response to SER Confirmatory Item;
References
	NUDOCS 8612300359
	Download: ML20207D250 (83)
	v • d • e

I I Revision December 22, 1986 I

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I Criteria Report I

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CRDR CRITERIA REPORT REVISION LOG I Revision No. Date Description Pages Affected 3 12/22/86 Section 11.0, General 11-1 thru

! Revision 11-7 f

4 12/22/86 Appendix L, General L-1 thru L-19, Revision L-21, L-22, L-25 thru L-33, L-3 5 t heu L-40, L-421 hru L-46, L-48 2 12/22/86 Appendix O, General 0-4, 0-5 Revision 2 12/22/86 Appendix Q, General Q-9 thru O-12, Revision Q-14 thru Q-1 A I

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I SECTION 11.0 SPDS FEATURES l

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._ . POWER CO. 3 11.0 SPDS FEATURES 11.1 FUNCTIONAL REQUIREMENE The basic function of the SPDS is to provide operating personnel in the control room the necessary information for making quick assessments of the plant safety status, 11.1.1 SPDS Functions A. Provida continuous indication of selected plant parameters and derived variables representative of safety status of the plant B. Aid operator in the detection of abnormal operating conditions I

C. Assist in analysis and diagnosis of cause of abnormalities D. Monitor plant response to corrective actions E. Provide signal validation and functional comparison capability F. Flag invalid data G. Provide trending capabilities II. Be responsive to all operating modes as listed in Section 11.1.9 l3

!. Provide audio or visual cues for:

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1. Existence of unsafe operating conditions in plant

2. SPDS system failures i

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I 11.1.2 Eoulpment Required To implemen. Functions Equipment shall be provided for driving the required displays, accepting inputs and acknowledgements from the operator, and providing communication links with other systems.

Operator interface shall be included which provides display devices and pushbuttons or switches for implementing the operator / system interface requirements.

I Sufficient redundancy shall be provided to satisfy all functional requirements and availability goals.

11.1.3 Criteria For Integration With The Control Room I 11.1.3.1 Location Displays shall be located in the control room at one or more specially designated stations.

A set of function keys and/or a full keyboard shall be installed at each display station to 3

provide operator interaction for that display station.

I 11.1.3.2 Redundancy Requirements I To simplify the man-machine interface and minimize operator errors, a single display system shall be used for evaluating the safety status of the plant. Redundancy shall be I provided as necessary to meet the availability requirements.

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11.1.3.3 Operator Interface The SPDS shall be integrated into the control room in such a manner that it will:

A. Not interfere with access to the operator interface of any other system B. Be readily observable during normal operational activities C. Impose little or no additional training requirements upon the operating staff (i.e. the displays, indicators, and controls should be very nearly self explanatory).

D. Be easily recognizable and readable.

I 11.1.3.4 SPDS Status VerMication and Failure Recognition Criteria System status indication and system problem and failure indication shall be provided.

11.1.4 Displays Critical safety functions to be monitored while the plant is operating shall include but not be limited to those listed in Section 9.4.1.

Provision shall be made for simultaneous display of brief messages or color cues applying to:

A. Plant conditions B. SPDS status I

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I C. Input conditions D. Operator prompts 11.1.5 System Response Times and Sampling Rates (Ref. NUREG 0700, Sec. 6.7.1.7)

I Positive feedback must be given to keyboard entry by the operator.

Considering the nature of the SPDS functions as listed in Section 11.1.1, response to display requests (i.e., acknowledgement) must occur within two seconds.

3 J 11.1.6 Deleted I 11.1.7 Data Filtering and Smoothing Criteria Sm thing transforms shall be applied to current values and shall use data consistent with 3

the scan rate of the associated input.

11.1.8 Ilad input Handling Criteria I Detectable input failures (measurement errors, bad instrumentation, etc.) shall be flagged. Calculations based on manually replaced input values shall be indicated as such.

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11.1.9 System Transient Response and Plant Operating Moda Detection Criteria

'Ihe basic SPDS displays shall be functioning and valid during all plant transients in accordance with the availability requirements. Without operator intervention, the system shall be able to display parameters for at least the following plant operating modes:

A. Power operation B. Startup g E1 C. Hot standby D. Ilot shutdown I

E. Cold Shutdown F. Refueling (Via auxiliary displays) 11.2 IlUM AN FACTORS REQUIREMENTS 11.2.1 Display Criteria 11.2.1.1 Display Concepts and Formats There shall be a system top level display which will indicate the overall status of each l3 selected safety function. This display shall serve as the SPDS monitoring display. Other display formats shall be available for use as auxillary displays to provide more detailed information when requested by the operator.

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I Special display formats shall be developed for the following:

A. Top level display 3l B. Auxiliary displays C. Point detail displays I3l 11.2.1.2 Readability I (Ref. NUREG 0700, Sec 6.5.1.3, 6.7.2.1, 6.7.2.2)

Display format shall be carefully evaluated to optimize readability. Large characters or special graphics may be used to emphasize the display or to allow reading data from further than normal reading distance.

11.2.1.3 Logging and Trending Criteria Illstorical data shall be maintained for the last 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . At least 8640 time points shall 3l be maintained for each variable. This data shall be available for variable trend dispinys and for logging on a printer upon operator request.

I 11.2.1.4 Other Display Criteria (Ref. NUREG 0700, Sec. 6.7.2)

Other display criteria related to display mounting, lighting, presentation formats, trend B plots, operator interaction, use of color and graphics, highlighting, and paging shall he as specified by NUREG 0700, Sec. 6.7.2 and described in Appendix Q, Guidelines Specific to 3I CRT Displays.

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11.2.2 Display, Indiention, and Alarms Criteria Status indication shall be used to indicate failures on the SPDS equipment. Audible annunciation may be used to attract operator attention or to signal a plant safety status deviation from normal conditions. Plant status information shall only be presented on the 3 display devices.

11.2.3 Criteria For Operator Interaction The following operator interaction capability shall exist at each display station:

A. Acknowledge

13. Verify status (of SPDS)

C. Change displays D. Recall data 11.2.4 Data Compression I

Data to be displayed may be compressed by using averages of a set of variables where appropriate. Ilowever, if the average contains bad, suspect or manual inputs, the resulting average shall be flagged, 11.2.5 Operator Perception Critoria l

The display method used shall be self-explanatory and shall not be dependent upon l operator memory for intemretation.

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INTRODUCTION When using the abbreviation list, the following general principles should be apolied:

A. More than one abbreviation per term should be avoided (note that in those cases where more than one abbreviation per term has been included, the preferred abbreviation is listed first.) %ls is not to say that all the listed alternatives are acceptable in every application. The primary reason for this approach is to maintain and encourage consistency and to avoid multiple forms for the same term.

B. Words of four charactor length or shorter should not be abbreviated.

C. Two character abbreviations should generally be avoided because of readability problems and the inerensed probability of having one abbreviation for two or more terms. When a requirement for two character abbreviations cannot be avoided, extreme care should be taken to avoid conflict with existing abbreviations.

D. Words endings such as -ed, -ing, s, and -es should not be included in an abbreviation, using instead the root word or its abbreviation. If such ondings must be used, avoid ambiguity: for example, since " ROOM"Is "RM" and " Radiation Monitoring System"is "RMS," the latter should not be used for " ROOMS". Instead, if " ROOMS" must be abbreviated in its plural form, an npostrophe (i.e., "RM'S") should be used.

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I E. There may be cases when an abbreviation is not practical. We following I criteria should be used for making this determination:

1. %e word is infrequently used.

2. De abbreviation is not a significant decrease in the total number of characters.

3. We only acceptable abbreviation has too many totally different j terms associated with it.

F. Dere are cases where terms /words are most familiar as abbreviations instead of being spelled out (e.g. IIVAC instead of Ileating, Ventilation, &

Air Conditioning). %ese abbreviations are noted by an asterisk (*) and should always be used even if space would permit the spelling out of the words.

I 0. Use of one abbreviation to mean more than a single expression should be avolded. When this is considered necessary, it should be ensured that when rend in context, the meaning of the abbreviation is self-explanatory.

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4 Abbrevlations for " units per units"(e.g. roentgens per hour, inches per hour, etc.) may be formed using the abbreviation for each unit with a separating slash (e.g. II/ilR, IN/l!!!, etc.).

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LIST OF ACRONYMS, ABBREVIATIONS AND TERMS 4f Abbrevintion Menning ABS ABSOLUTE ABV ABOVE A/C Allt CONDITIONING AC* ALTERNATING CURRENT ACC ACCUMULATOR 4 ACCEL ACCELER ATION/ACCELER ATE ACCID ACCIDEN O g

ACKN ACKNOWLEDGE E ACP AUXILIARY CONTROL PANEL ACT ACTIVE / ACTIVATE D/ACTU ATE /ACTU ATO R /ACTIVIT Y ACW AUXILIARY COOLING W ATER ADD ADDITIVE ADJ ADJUST /ADJUSTM ENT/ ADJUSTER ADMIN ADMINISTilATION ADPTR AD A P'l Ell ADV ADVANCE AFT AFTEll AFTCLR AFTEllCOOLEit AFW* AUXILIARY FEEDW ATER AFWP' AUXILIARY FEEDWATElt PUMP AFW PT AUXILIARY PEEDW ATEll PUMP TURBINE AFWS' AUXILIARY FEEDWATEit SYSTEM AFWST AUXILIARY FEEDW ATElt STOll AGE TANK

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Denotes nbbrevintions that shotild be tised ns nbbrevintions, even when space wotild permit spelling otit the word.

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AIIU* AIR IIANDLING UNIT AIES AIR INTAKE AND EXilAUST SYS"EM AIRB AIRBORNE ALM ALARM ALR ALERT

[ ALT AMD ALTERNATE / ALTERNATOR AMBIENT

[ AM P* AM PERES H AMPL AM PLIFIER AMSAC ATWS MITIGATION SYSTEM ACTUATION CIRCUITRY ANNUN* ANNUNCIATOR l4 AOV AIR-OPER ATED VALVE APC Al?XILIARY PROCESS CABINET l4 AltM AREA R ADIATION MONITOR ASMT ASSESSM ENT l4 ASP AUXILIARY S!!UTDOWN PANEI, ASR AUXILIARY SilOTDOWN ItOOM ASSOC ASSOCIATED y ASSY ASSEMBLY h ATM ATMOSPilER E/ATMOSPl!ERIC ATWS ANTICll'ATED TR ANSIENT WITl!OUT Scil A M AUCT AUCTIONEER / AUCTIONEER ED AUTO

AUTOM ATIC l4 AUX

AUXILIAR Y AU XIILR AUXILI Alt Y llOILER AVAIL AVAll,ABLE AVG AVERAGE 4 E

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BA BORIC ACID BAL BALANCE BANK CONTROL ROD BANK BAR BARRIER BAT BORIC ACID TANK 11ATCII BATCillNG BATT BATTERY BORON 4l B10, B BCK BACK BCV BYPASS CONTROL VALVE DI BORON INJECTION BK 11ANK f1KR BREAKER BKW BACKWASil ilLD 11LEED 11LDG* 11UILDING 11LK BLOCK BLKD I1 LOCKED BLR* IlOILEll llLU BLUE llLWDN lli,0W DOWN BLWDNFT BLOWDOWN PLASif TANK IlOD 1110CilEMICAI, OXYGEN DEM AND BOOST flOOSTEll llOOSTPM P IlOOSTER PUMP I1O P II ALANCE OF PLANT IlOT llOTTOM llPC llYPASS CONTitOI, ll& PV IlOILEll AND PitESSUllE VESSEL, 11/8 U!STAllLE IIPit A IlUltNAlli E POISON ItOD ASSEMilLY I

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' I BRG* IIEARING l IIRNCII BRANCII l BRS BORON RECYCLE SYSTEM BRSil IIRUSil BRTG AIR IIREATIIING AIR BSCV BYPASS STOP AND CONTROL VALVC i BTFL BUTTERFLY 11TR BORON TIIERM AL RECENER ATION I BTRS*

BTU 110RON TIIERM AL REGENER ATION SYSTEM IIRITISil TIIERM AL UNIT UTV BLEEDER TRIP VALVE B/0, BU BYP BACKUP 11YPASS l4 I

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C CRITICAL / CORE COOLING 4l C* CENTIGR ADE// DEGREES CENTIGR ADE Cb BORON CONCENTR ATION CB CONTROLRANK 6l C/L OENTERLINE C/U CLEANUP CAB CADINET CAL CALIBR ATION/CALIBR ATE CARR CARRIER CAS CENTRAL ALARM STATION 4l CAT CllEMICAL ADDITION TANK CAV CAVITY CDP CONDENSATE BOOSTEll PUMP CC CUDIC CENTIMETER CCE CONTAINM ENT Cull!CLE EXIIAUST CCF CONTAINMENT CARDON FILTER CCO CONTAINMENT COMBUSTIBI.E GAS CCP CENTRIFUGAL CilAltGING PUMP C r'3 CONTAINM ENT COOLING SYSTEM CCTV CLOSED CIRCUIT TEI EVISION CCW COMPONENT COOLING WATER CENT CENTRIFUGA!,

CFM* CUDIC FEET PEll MINUTE C FS* Cull!C FEET PEll SECOND CGCS COMilUSTillt,E GAS CONTilOI, SYSTEM Cil CilANNEL 4I CilAR Cll AllCO AI, CilEM CllEMIC AI, Cill:MWST CllEMIC AI, W ASTE C110 ellAll0E/CilARulNG CllOR Cll ARG Ell I

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CHL CHILL ,

I CHLD CHLOR CHILLED CHLORINATION / CHLORINE CHLR CHILLER CHMBR - CHAMBER CHR CONTAINMENT HEAT REMOVAL CHRS CONTAINMENT HEAT REMOVAL SYSTEM CHWS ~'

CHILLED WATER SYSTEM Ci CURIE CIA CONTAINMENT ISOLATION PHASE A CIB CONTAINMENT EOLATION PHASE B I CIRC

CIRCULATING / CIRCULATION CB CONTAINMENT EOLATION SYSTEM /

CONTAINMENT ISOLATION SIGNAL CIV CONTAINMENT EOLATION VALVE CK,CHK CHECK 4 CKCS CRANKCASE

, C KT* CIRCUIT CL , CL2 CHLORINE 2

CLD COLD CLDN COOLDOW N 4

CLG COOLING g cLNO CtEANINO CLNR CLEANER CLR COOLER CIS CLOSED / CLOSURE CLSDLP, CL CLOSED LOOP I CMP CM PTR COMPENSATED COMPUTER 4

CNDCT CONDUCTIVITY CNDSR CONDENSER I

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CNTMT CONTAINM ENT CO2*, CO2 CARBON DIOXIDE COLL COLLECTING / COLLECTOR / COLLECTION COMB COMBINED COMM COMMON COMP COMPONENT COMPART COMPARTMENT COMPR* COMPRESSOR 4 COMS COLD OVERPRESSURE MITIG ATION SYSTEM CONC

CONCENTR ATION/CONCENTR ATED/CONCENTR ATES COND*

4l CONDENSATE / CONDENSER g CONF CONFIRMED E CONN CONNECTION CONT CONTROL CONTAM CONTAMINATIO N CONTR CONTROLLER CONV CONVERTER CONVC CONVECTION COOL COOLANT CP CONTROL PANEL CPDS CONDENSATE POLISHING DEMINERALIZER SYSTEM CPLG COUPLING CPM COUN'IS PER MINUTE CPR CONDENSATE POLISHING REGENERATION CPRW CONDENSATE POLISHING REGENER ATIVE W ASTE I

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CPS COUNTS PER SECOND CR CONTROL ROOM CRBN CARBON 3 CRD CONTROL ROD DRIVE CRDM CONTROL ROD DRI'/E MECHANISM CRDS CONTROL ROD DRIVE SYSTEV CREL CONTROL RELAY L-10 12/22/86 6625P/0656P

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CRIT CRITICAL I CRS CRT CONTAINMENT R ADIATION SIGN AL CATHODE R AY TUBE CS CONTAINMENT SPR AY CSAS CONTAINMENT SPRAY ACTUATION SIGNAL CSF CRITICAL SAFETY FUNCTION l4 CSG CASING CSIV CONTAINMENT SUMP ISOLATION VALVE CSIVC CONTAINMENTSUMP EOLATION VALVE CUBICLE g CSP CONTAINMENT SPRAY PUMP CSS CONTAINMENT SPR AY SYSTEM I CSW CTR CONTROL SWITCH CENTER CUB CUBICLE CUR CURRENT CV CONTROL VALVE -

CVCS* CHEMICAL VOLUME CONTROL SYSTEM CVH CONTAINMENT VENT HEADER CVI CONTAINMENT VENTILATION ISOLATION CVP CONDENSER VACUUM PUMP CW CIRCULATING WATER CW P* CIRCULATING W ATER PUM P CWS CIRCULATING WATER SYSTEM CYL CYLINDER I

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DBA DESIGN BASIS ACCIDENT D C* DIRECT CURRENT DD DIESEL / DRIVEN DE DIESEL / ENGINE DEAER DEAERATOR DECON DECONTAMINATE / DECONTAMINATION DEF DEFEAT DEG* DEGREES DEMIN* DEMINERALIZER DESUPHT DESUPERHEAT/DESUPER HE ATER DET DETECTED / DETECTION / DETECTOR g DEV DEVIATION 5 DEW PT DEW POINT DF DECONTAMINATION FACTOR DG DIESEL GENER ATOR DGB DIESEL GENERATOR BUILDING -

DGCAIES DIESEL GENERA'IVR COMBUSTION AIR INTAKE AND EXH AUST SYSTEM DGF DIESEL GENERATOR FUEL 4 DGFOST DIESEL GENERATOR FUEL OIL STOR AGE AND TR ANSFER DGTL DIGITAL DIAPII DIAPHR AGM DIFF DIFFERENCE / DIFFERENTIAL DIL DILUTE / DILUTION DISC DISCONNECT DISCH DISC HARGE DISP DISPLACE DIST DISTRIBUTION DIV DIVISION DLVL DIFFERENTIAL LEVEL DMPR, DAMP D AM PER I

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DN DOWN DNSC DOWNSCALE DO D5 SOLVED OXYGEN l4 DOM DOMESTIC DP DIFFERENTIAL PRESSURE DPM DECADES PER MINUTE /DISINTEGR ATIONS PER MINUTE DPU DATABASE PROCESSING UNIT DRN l4 DRAIN DRPI DIGITAL ROD POSITION INDICATION DRV DRIVE / DRIVEN DRYR DRYER DSL DIESEL DSLVD DESOLVED DSTL DISTILLATE DT DIFFERENTIAL TEMPER ATURE DVC DEVICE DVRT DIVERT /DIVERSIO N DWS DEMINERALIZED WATER SYSTEM I DWST DEMINERALIZED WATER STOR AGE TANK I

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E EAST EAB ELECTRICAL AUXILIARY BUILDING ECC EMERGENCY CORE COOLING ECCEN* ECCENTRICITY ECCS EMERGENCY CORE COOLING SYSTEM ECON ECONOMIZER ECP ESSENTIAL COOLING POND ECTS EFFLUENT CHEMICAL TREATMENT SYSTEM ECW ESSENTIAL COOLING W ATER EDT EQUIPMENT DRAIN TANK EDUCT EDUCTOR g EER ELECTRIC EQUIPMENT ROOM E EES EMERGENCY EXHAUST SYSTEM EFDS EQUIPMENT AND FLOOR DRAIN SYSTEM EFL EFFLUENT EFLTR EFFLUENT FILTER EH ELECTRO-HYDR AULIC EHC ELECTRO-HYDR AULIC CONTROL EL ELEVATION ELEC ELECTRIC / ELECTRICAL ELEM ELEM ENT 4l EMER* EMERGENCY EM ERFLTR EMERGENCY FILTER EMS EMERGENCY SERVICE ENCL ENCLOSURE ENG ENGINE ENT ENTER / ENTERING EQUIP EQUIPMENT 5 4 E/R EXTENDED R ANGE ERF DADS EMERGENCY RESPONSE FACILITIES DATA ACOUISITION AND DISPLAY SYSTEM ES ENGINEERED S AFEGU ARDS L-14 12/22/86 6625P/0656P

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ESCWS ESSENTIAL CHILLED W ATER SYSTEM l4 ESF ENGINEERED SAFETY FEATURE ESS ENGINEERED SAFEGU ARDS SYSTEMS ESSEN ESSENTIAL EST ESTIMATED ET EMERGENCY TR ANSFORMER EVAL EVALUATION EVAP EVAPOR ATOR/EVA POR ATION EXC EXCITER EXCH EXCHANGE EXCS,EXC EXCESS l4 I EXCT EXCITATION EXH* EXHAUST EXP EXPANSION EXPTK EXPANSION TANK EXTD. EXTENDED EXTR EXTRACTION I

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F FAHRENHEIT / DEGREES FAHRENHEIT I

F/ACT FAIL TO ACTUATE FAIL FAILURE

, FBKR FEEDER BREAKER F/CLOSE, FTC FAIL TO CLOSE FCV FLOW CONTROL VALVE FD FEED FDR FEEDER FDRFT FORCED DR AFT FDT FLOOR DRAIN TANK FFD FAILED FUEL DETECTOR FHB FUEL HANDLING BUILDING FHS FUEL HANDLING SYSTEM FI FLOW INDICATOR FIS FLOW INDICATING SWITCH FLD FIELD FLNGE FLANGE FLR FLOOR FLSH FLASH 4 FLT FAULT FLTR FILTER FLX FLUX FM FROM FN FAN FO FUEL OIL F/OPEN, FTO FAIL TO OPEN FOPN FULLY OPEN FPMP FEED PUM?

FPS FEET PER SECOND FPT FEED PUMP TURBINE FR FLOW RECORDER FREo FREQUENCY l L-16 l 12/22/86 6625P/0656P

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FRNT FRONT F/STR P FAIL TO STRIP F/STRT, F/ START FAIL TO START F/STOP FAIL TO STOP FT* FOOT / FEET FTS FUEL TRANSFER SYSTEM FUNC FUNCTION / FUNCTIONAL FW FEEDWATER FWD FORWARD FWIB FEEDW ATER ISOLATION BYPASS FWIBV FEEDW ATER ISOLATION BYPASS VALVE FWIV FEEDWATER ISOLATION VALVE FWS* FEEDW ATER SYSTEM t

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GD GUARD GEN GENERATOR GL GLAND )

GND GROUND l GOV GOVERNOR GPM* GALLONS PER MINUTE l GR GROSS '

GRAD GRADIENT GRBX GEARBOX GRN GREEN GRP,GP GROUP 4l GUID GUIDE GW PS GASEOUS WASTE PROCESSING SYSTEM I

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H HEAT SINK l4 HC HAND CONTROLLER liCV HAND CONTROL VALVE HD HEAD HDP HEATER DRIP PUMP HDR HEADER HELBA HIGH ENERGY LINE BREAK ACCIDENT HEPA HIGH EFFICIENCY PARTICULATE AIR HG MERCURY HH HIGH HEAD I HHSI HI HIGH HEAD SAFETY INJECTION HIGH HIVOLT HIGH VOLTAGE HJTC HEATED JUNCTION THERMOCOUPLE H/L, HI/LO HIGH/ LOW HNDLG HANDLING HORIZ HORIZONTAL I HOTWL HOTWTR HOTWELL HOT W ATER HOUS HOUSE HP HIGH PRESSURE /IIORSEPOWER l4 H. P. HEALTH PHYSICS HPU HYDR AULIC POWER UNIT HR HOUR HT HEAT l HTG HEATING H ,H2 HYDROGEN 2

HTR* HEATER l H/U HEATUP HUM HUMIDITY HVAC* HEATING, VENTILATION, & AIR CONDITIONING L-19 12/22/86 6625P/0656P

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HX* HEAT EXCHANGER HYD HYDRAULIC HYPCHL HYPERCHLORIDE/HYPERCHLORINATED HZ* HERTZ I

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I INVENTORY l4 IA INSTRUMENT AIR IAS INSTRUMENT AIR SYSTEM ICC INADEQUATE CORE COOLING ICIV -

INSIDE CONTAINMENT ISOLATION VALVE I&C INSTRUMENTATION AND CONTROL ILRT INTEGRATED LEAK RATE TEST IMP IM PUISE IM PL IMPELLER IN INCH INACT l4 INACTIVE I INBD INBOARD INC INCOMPLETE INCM INCOMING IND INDICATION 4 INDIC INDICATOR INDIV INDIVIDUAL INFL INFLUENT INFO INFORMATION INIT INITIATE / INITIATED / INITIAL INJ INJECTION INL INLET INOP INOPERABLE / INOPERATIVE INPT INPUT I INSRT INSTR INSERT / INSERTION INSTRUMENT / INSTRUMENTATION INTK INTAKE INTLK INTER LOCK INTRPT INTERRUPT INVRTR INVERTER IR INTERMEDIATE R ANGE IRC INSIDE REACTOR CONTAINMENT L-21 12/22/86 6625P/0656P

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IRM INTERMEDIATE R ANGE MONI'IDR I

IRS IODINE REMOVAL SYSTEM ISOL ISOLATION / ISOLATOR ISOL VLV, IV ISOLATION VALVE IVC ISOLATION VALVE CUBICLE I

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K THOUSAND I

KEFF EFFECTIVE NEUTRON MULTIPLICATION FACTOR KV* KILOVOLT K VA* KILOVOLT - AMPERE g KVAH* KILOVOLT - AMPERE HOUR W KVAR* KILOVARS KW* KILOWATT KW H* KILOW ATT HOUR I

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I L LEFT LAB LABORATORY LB POUNDS LBM POUNDS M ASS I LC LOAD CENTER LCKOUT, L/O LOCKOUT LCV LEVEL CGNTROL VALVE LD LOAD LDS LEAK DETECTION SYSTEM LEAK LEAKAGE I LED LH LHSI LIGHT EMITTING DIODE LEFT HAND LOW HEAD SAFETY INJECTION LI LEVEL INDIC ATOR LIQ LIQUID LKF LEAKOFF LLRT LOCAL LEAK RATE TEST LMT LIMIT I LN LINE LNK LINK I L. O.

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LP A LOOP A LP B LOOP B LP C LOOP C w LP D LOOP D g

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E MA MILLIAMPERE I M/A MAB MANUAL / AUTOMATIC MECHANICAL AUXILIARY BUILDING MAG MAGNETIC I MAINT MAN MAINTENANCE MANUAL MAX MAXIMUM MB MISSILE B ARRIER 4 MCB M AIN CONTROL BOARD MCC MOTOR CONTROL CENTER MCWV MICROWAVE MEAB MECHANICAL ELECTRICAL AUXILIARY BUILDING MEAS MEASURE MECH MECHANICAL M ET METEOROLOGY l4 MEV MILLION ELECTRON VOLTS MFCS M AIN FEEDW ATER CONTROL SYSTEM MFIV MAIN FEEDWATER ISOLATION VALVE Ii MG MOTOR GENER ATOR

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I N NORTH / NORMAL l4 NA SODIUM N/A NOT APPLICABLE SODIUM HYDROXIDE I

N A O H N ,N2 NITROGEN 2

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O/A OUTSIDE AIR I

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OUTP OUTPUT OVERRD OVERRIDE OVERSP OVERSPEED I

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I P RCS INTEGRITY l4 PA PUBLIC ADDRSSS (SYSTEM)

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PORY POWER-OPERATED RELIEF VALVE I

POS POSITIVE POSIT, POS POSITION 4l POT POTENTIAL / POTENTIOMETER g PPB PARTS PER HILLION 5 PPM PARTS PER MILLION PR POWER RANGE 4 PRCT PERCENT PREHTR PREHEATER i PREP PREPARE /PREPAR ATION PRESS PRESSURE PRI PRIM AR Y '

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PSIG POUNDS PER SQUARE INCH GAUGE PSS PRIM AR Y SAMPLING SYSTEM l PSW PLANT SERVICE W ATER PSWS POTABLE AND S ANITARY W ATER SYSTEM I

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PT PRESSURE TR ANSMITTER P-T PRESSURE - TEM PER ATURE PT ID POINT IDENTIFIER (COMPUTER) t PTL PULS PUR PULL TO LOCK PULSATION PURGE l4 PURIF PURIFICATION PVH PLANT VENT HEADER PWR POWER PWR-O P POWER-O PER ATED I

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QA QUALITY ASSUR ANCE QDPS QUALIFIED DISPLAY PROCFSSING SYSTEM QUAD QUADRANT QUAL QUALIFIED I

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R RIGHT/ ROENTGEN l4 I RAD RADWST RADIATION R ADIO ACTIVE W ASTE 4

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REIN, REINIT REINITIATE N.

REL RELAY

, REM ROENTGEN EQUIVALENT M AN REQD REQUIRED 4 RET RETURN REV REVERSE / REVISION RH RIGHT HAND / REHEAT RilDS REACTOR HEAD DEGASSING SYSTEM RHR* RESIDUAL HEAT REMOVAL g R HRS

RESIDUAL HEAT REMOVAL SYSTEM E RHT RECYCLE HOLDUP TANK RHTR REHEATER RJB REFERENCE JUNCTION BOX 4l RLF RELIEF RLFV RELIEF VALVE RM ROOM RMPF RESERVOIR MAKEUP PUMPING FACILITY _

RMR R ADIATION MONITOR ROOM RMS R ADIATION MONITORING SYSTEM RMT REMOTE RMU REACTOR M AKEUP RMW REACTOR M AKEUP W ATER RMWS REACTOR M AKEUP W ATER SYSTEM

' RMWST REACTOR M AKEUP WATER STOR AGE TANK RNG RANGE RO REACTOR OPER ATOR R PI CONTROL ROD POSITION INDICATION I

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I RPS REACTOR PROTECTION SYSTEM 1 RSTR RESTRAINT RSVR RESERVOIR RTD* RESISTANCE TEMPER ATURE DETECTOR I RTN/ RET RTS RETURN REACTOR TRIP SYSTEM RUNBK RUNBACK RV REACTOR VESSEt l4 g RVwt REiCTOR VESSEt WATER tEvst R WST* REFUELING W ATER STORAGE TANK RX* REACTOR I

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4 S SOUTH /SUBCRITICALITY I

SA SPRAY ADDITIVE SANI SANITARY SAS STATION AIR SYSTEM g SAT SATURATION 5 SBKR SUPPLY BREAKER SCRN SCREEN S/D SHUTDOWN SDS STEAM DUMP SYSTEM SEC SECONDARY SEC'I SECTION SEL SELECT / SELECTOR SENS SENSOR .

SEP SEPARATOR SEQ SEQUENCE SEQR SEQUENCER SER SERVICE SET SETTING SETLG SETTLING SETPT SETPOINT SFA SPENT FUEL ASSEMBLY SFGD SAFEGUARD SFP SPENT FUEL POOL SFPC SPENT FUEL POOL (PIT) COOLANT / SPENT FUEL POOL (PIT) COO LING SFPCS SPENT FUEL POOL (PIT) COOLANT SYSTEM W SFS SPENT FUEL STORAGE SFTY SAFETY

, SG STEAM GENERATOR 4 SGBD STEAM GENER ATOR BLOWDOWN SGBS STEAM GENER ATOR BLOWDOWN SYSTEM SGFP STEAM GENERATOR FEED PUMP L-38 12/22/86 6625P/0656P

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.I SGFPT STEAM GENERATOR FEED PUMP TURBINE SGR SWITCHGEAR ROOM SGWLCS STEAM GENERATOR WATER LEVEL l4 COM PENS ATION SYSTEM SHLD SHIELD SIlUTDN SIIUTDOWN l4 SHUTDNBK SHUTDOWN BANK SHWR SHOWER SI S AFETY INJECTION SIAS SAFETY INJECTION ACTUATION SIGNAL SIGNAL I SIG SIS SKMR SAFETY INJECTION SYSTEM SKIMMER SL SEAL l4 SLWTR SEAL W ATER SMK SMOKE SMP SUMP 4

SMPL S AMPLE /S AM PLING I SMT S.O.

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g TAS TEMPERATURE AVERAGING SYSTEM (RCS HOT LEG)

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TG TURBINE GENER ATOR TGB TURBINE GENERATOR BUILDING TGSS TURBINE GLAND SEAL SYSTEM THERM 4l THERM AL/THERMOM ETER THR THRUST THROT TIIROTTLE g

TN TH HOT LEG REACTOR COOLANT y TI TEM PER ATURE INDICATOR TIEBKR TIE BREAKER TK TANK TM THERM AL M ARGIN TNL TUNNEL T & T, T AND T TRIP AND THROTTLE

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U URANIUM I

UAT UNIT AUXILIARY TRANSFORMER U/F UNDERFREQUENCY UHTR UNIT HEATER 4 UIC UNCOMPENSATED ION CHAMBER g UNCMP UNCOM PENSATED UPPR UPPER UPS UNINTERRUPTIBLE POWER SUPPLY UPSC UPSCALE U/V UNDERVOLT/UNDERVOLTAGE pAMP MICROAMPERES 4

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V VOLT / VOLTAGE I VA VAC VO LT-AM PER ES VACUUM V/AC VOLTS AC VAR -

VOLT-AMPERES REACTIVE VCT VOLUME CONTROL TANK VDC VOLTS DC VENT VENT / VENTILATION VENTLSYS VENTILATION SYSTEM VERT VERTICAL I VIB VISC VIBRATION VISCOSITY VLV VALVE VOL VOLUME VOLTLOSS LOSS OF VOLTAGE VOLTM VOLTM ETER VOLTR VOLTAGE REGULATOR I VPI VPR VALVE POSITION INDICATOR / VALVE POSITION INDICATION VAPOR VSL VESSEL VT VENT I

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APPENDIX O PROCESS COMPUTER GUIDELINES I

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O.1 FUNCTION The process computer shall provide the operators with assistance in continuous assessment and evaluation of process and system status information.

O.2 OPER ATOR - COMPUTER INTERF ACE Effectiveness and operator's acceptance of the computer assisted process monitoring depend largely on the quality of man-machine interfaces, i.e., simplicity of procedures g required to identify and retrieve necessary data and suitability of formats in which the a retrieved information is displayed. 'Iherefore, the basic Human Factors criteria in the design of man-machine interface can be formulated essentially as a requirement to minimize the number and complexity of computer specific motions and procedures to be learned by the operator so that he is able to communicate with the system effectively.

The following criteria shall be considered in the design of the operator-computer interface:

A. Command method, documents, procedures and CRT displays designed for the operator's use shall incorporate the operator's point of view, not the programme r's.

B. 'The operator shall be provided with a convenient means of selecting the I

major displays without seatt!hing through supplementary manuals or memorizing special codes and procedures.

C. Display formats shall be consistent with information presentation standards adopted in the control room.

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D. Groups of functionally interrelated displays, e.g., those representing plant systems and corresponding subsystems, should be organized into I hierarchical sets with simple access from one display to another. The hierarchy of displays shall include a list (menu) of all the display sets available, with numerically designated items. Menus shall be functionally organized into a single multi-level system.

I E. Operator input procedures shall be developed so that the operator is prompted through all the sequential steps of the input procedure. He I system shall provide feedback indicating the mode of system operation, acknowledging operator actions or indicating the action's outcome and subsequent actions required. Correction of individual errors in the input sequence shall not require re-entry of correctly entered data. Error messages generated by the system shall include instructions on required corrective actions.

F. Most frequently requested displays shall be accessed by a group of dedicated function keys. %e function keyboard shall be laid out in the format that corresponds to natural procedural sequence.

G. Process parameters that indicate an alarm state shall be represented by conspicuous (blinking) alarm messages on corresponding displays.

I H. We alarm function display shtdl be updated to reflect most current alarm status.

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I. As new alarms are received, the previous messages shall be moved down the screen. After filling the screen, the oldest messages shall be I

removed, but the information shall be fully retained, and the operator 5 shall be provided with means to recall any alarm page.

J. He alarm message shall consist of the following:

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1. Point identification

2. English legend

3. An alpha symbol to denote the limit exceeded

4. The value of the alarm limit

5. We value of the variable .

K. The operator shall be able to remove alarm messages after the point has returned to normal.

i L. The acknowledge key shall cause the blinking display to return to steady state.

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! M. Provisions shall be made such that operation of any of the keys on the main control panels cannot cause loss of valid alarms.

N. Ilard copy reflecting the history of the alarm messages shall be generated.

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O. A structured menu of all interface functions with brief explanations shall be available to the operator. Selectable menu items shall be designated by numbers.

P. Chronological listing of event messages representing the change of state

( of any of the inputs designated as sequence of events shall be available at operator request, providing a minimum of 200 sequence of event points, with time resolution of the sequence of events not greater than 4 2 milliseconds.

Q. All CRT displays shall be conveniently located and provide unobstructed I view for the operator at the normal work station. Maximum screen fill time shall be less than 5 seconds. Dynamic update time shall be in 2 accordance with the assigned scan-rete of the displayed parameter and useage of the information.

O.2.1 SOFTW ARE SECURITY (Ref; NUREG-0700 Sec. 8.7.1.1)

Access to the process computer software and database from the control room shall be closely controlled. The following criteria shall apply to ensure software security:

A. Provisions shall be made to ensure that only authorized personnel have access to the database, programs, and other areas in software.

I B. Preferred security method is keylock and password combination for

! accessing different software levels along with other built-in security deterrents.

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C. He plant data acquisition system shall be protected against overwriting its operating system software due to error or improper instruction in unrelated software or due to unauthorized or inadvertent changes. One copy of the current operating software shall be stored in a specially designated remote location.

D. Certain data must be preserved through extended power outages. Power backup should be provided for a minimum of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

E. Any operator action which might result in permanent changes to the existing data or yield significant consequences to the computer system shall be executed only after explicit operator confirmation. %e confirmation shall not be a component of a routine command sequence and shall present sufficient safeguard against inadvertent actions.

O.2.2 OPERATOR / COMPUTER DIALOGUE (Ref: NUREG-0700, Sec. 6.7.12)

The following criteria shall apply for the operator / computer dialogue:

A. Command language utilized in the operator / computer interaction shall be based on vocabulary and syntax suitable for use by the expected user population.

B. Keywords the operator is required to input in the dialogue shall approximate generai: used words.

C. Abbreviations shall be used whenever practical to minimize the entry lengt h. Only standard abbreviations from the Abbreviations List in Appendix L shall be used.

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D. In any required operator entry sequence, individual input words shall not l have more than seven characters.

l E. Entry sequences shall be initially stored in the buffer area and displayed for operator reviewing before being collectively inserted by sp.ecial command.

I F. Provisions shall be mace so that information about the mode of system I operation, currently processed file and peripheral devices summary are available upon request to indicate the status of the system and system peripherals.

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L APPENDIX Q I

GUIDELINES SPECIFIC TO CRT DISPLAYS E

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_ POWER CD. E Q.1 CRT DISPLAY CHARACTERISTICS (Ref. NUREG-0700, Sec. 6.7.2.1)

Most contemporary process computer systems include one or more CRTs. These CRTs I

comprise the principalinterface between computer output and control room operators. It is therefore important that the characteristics of the CRT displays optimize the information transfer from the computer to the operator. 'Ihe quality of the displayed image must be consistent with operator needs. The following criteria shall be used to ensure image quality:

A. Readability - All characters, both alphanumeric and graphic, shall be easily readable by the operator under all control room lighting conditions.

B. Reflected Glare - CRT screens shall be installed to minimize or eliminate glare at normal operator viewing angles.

C. Screen Luminance

1. Ambient illumination shall contribute no more than 25 percent to screen luminance.

2. When the CRT employs dark characters on a light background, the screen background luminance shall be between 23 foot-Lamberts (minimum) and 46 foot-Lamberts (preferred).

3. When the CRT employs light characters on a dark background, the character luminance shall be between 23 foot-Lamberts (minimum) and 46 foot-Lamberts (preferred).

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l D. Luminance Contrast - Contrast between the characters and the l

t,ackground shall be 15:1 (minimum) and 20:1 (preferred).

E. Geometric Distortion - No point on the CRT viewing area shall be displaced by more than 5 percent of the picture height from its correct position.

I F. Resolution I 1. Alphanumeric CRTs shall have a minimum of 20 resolution elements per inch.

2. CRTs for displaying complex symbols and graphic detail shall have a minimum of 100 resolution elements per inch.

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3. Complex symbols which must be distinguished from other complex shapes shall have a minimum of 10 resolution elements for the am longest dimensions of the symbol.

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4. Alphanumeric characters shall have a minimum of 10 resolution elements per character height.

G. Regeneration Rate 'Ihe regeneration rate for a particular CRT display shall be abova the critical frequency at fusion so that the occurrence of disturbing flici<er is not perceptible.

11. CRT Display Controls

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1. Brightness, contrast and color shall be adjustable by the operator.

2. Adjustment controls shall conform to the appropriate criteria in Section 6.2 for Controls.

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Q.2 SYMBOLS AND CHAR ACTERS (Ref. NUREG-0700, Sec. 6.7.2.2)

Visual angles are the vertical angles subtended at the eye by a viewed object, symbol, or g

character. His angle, expressed in minutes of are, decreases in proportion to the 5 operator's distance from the CRT. His distance varies considerably because of the operator's movement within the control room. We human eye can distinguish symbols and characters at visual angles of 5 minutes of are under ideal conditions. However, because operational environments are not ideal, more stringent criteria than the above have to be applied. Following is a list of such criteria for CRT symbol / character variables:

A. Symbol Size - Complex symbols that must be distinguished subtend a visual angle of at least 20 minutes of arc.

B. Alphanumeric Character Size

1. Alphanumeric characters subtend a visual angle of not less than 12 minutes of are for the required viewing distance.

2. Alphanumeric characters shall be upper-case letters.

C. Character Width-to-Height Ratio -

he width-to-heig ht ratio for alphanumeric characters shall be between 3:5 and 1:1.

D. Stroke Width-to-Character Height Ratio - Stroke width-to-character height ratio shall be between 3:5 and 1:10.

E. Graphics - Graphic lines shall contain a minimum of 50 resolution elements per inch to ensure the illusion of continuity among these elements.

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I F. Character and Symbol Separation I 1. Horizontal separation between characters or symbols shall be between 10 pement and 65 percent of the symbol height.

2. Separation shall not be less than 25 percent of character.or symbol height when any of the following degraded conditions are present:

a. Character or symbol width is less than 85 percent of height

b. Character or symbol luminance is less than 12 foot-Lamberts I c. Luminance contrast is less than 88 percent

d. CRT screen location is greater than 35' to either side cf the operator's straight-ahead line-of-sight (LOS)

Visual angle subtended by symbol height is less than 15 are I e.

minutes

f. Visual angle subtended by character height is less than 12 are minutes I G. Character Style (Font)

I 1. Simple chsracter fonts shall be used (no serifs, varinble stroke widths, slanting, etc.).

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2. When dot-matrix characters are used, 7x9 dot-matrix shall be used I

in preference to 5x7 dot-matrix.

3. Character styles such as Lincoln / Mitre or Leroy shall be used.

Q.3 OPER A'IOR - DISPLAY RELATIONSHIP (Ref. NUREG-0700, Section 6.7.2.3)

CRTs may be either (1) fixed position mounted in a seated operator console, (2) fixed position mounted in a vertical standup panel, or (3) rotatable or moveable mounted on a stand or desktop. The following criteria will be considered regardless of the type of CRT installation and applied as necessary.

A. Viewing distance shall be at least 18 inches.

B. The minimum angle between the operator's actual line-of-sight (LOS) (as measured from the operator's normal work location) and the plane of the display screen shall be 45' or greater in either the horizontal or vertical direction.

C. Screen Location, Seated Operators i 1. CRT displays requiring frequent or continuous monitoring, or which l display critical (e.g. alarm) Information, shall be located within the following limits as measured from the normal operator work stations

a. llorizontal Limits - Not more than 35' to either side of the operator's straight-ahead LOS.

b. Vertical Limits - Not more than 20' above and 40' below the

, operator's horizontal LOS.

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I 2. CRTs not requiring frequent or continuous monitoring, and w!dch do not display critical (e.g. alarm) information, shall be located within the following limits as measured from normal work stations permitting full head and eye rotation:

a. Horizontal Limits - Not more than 95* to either side of the operator's straight-ahead LOS.

b. Vertical Limits - Not more than 70' above and 90' below the operator's horizontal LOS.

I D. Screen Location, Standing Operators

1. CRT displays requiring frequent or continuous monitoring, or which display critical (e.g. alarm) Information, shall be located within the following limits as measured from normal operator work locations in the control room:

I a. Iforizontal Limits - Not more than 35' to either side of the operator's straight-ahead LOS.

b. Vertical Limits - Not more than 35' above and 25' below the operator's horizontal LOS.

2. CRTs not requiring frequent or continuous monitoring, and which do not display critical (e.g. alarm) Information, shall be located within the following limits as measured from normal work locations in the i control room permitting full head and eye rotation:

a. I!orizontal Limits - Not more than 958 to either side of the operator's straight-abead LOS.

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b. Vertical Limits - Not more than 85* above and 90' be.'ow the I

operator's horizontal LOS.

E. When CRTs are mounted in consoles, the console configuration, dimensions, and type of use shall conform to the criteria that apply to work station design. Rese criteria are given in Appendix A.

F. All data and messages shall be within the unobstructed view of an I

operator at the normal work station.

Q.4 DATA PRESENTATION FORM AT (Ref. NUREG-0700, Section 6.7.2.4)

%e format used in presenting CRT data shall correspond to the follov'ing criteria:

A. Usability of Data >

1. Data shall be presented in a readily usable format. ;

2. Operators shall not be required to transpose, comoute, interpointe, E

or mentally translate displayed data into other numerical units or E bases.

I, B. Ulustrations shall be used whenever possible to supplement text.

C. Character Grouping Characters shall be grouped in blocks of three to four when five or i

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more digits and/or non-text alphanumerles are displayed, and no natural organization exista. <

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2. Groups should be separated by a minimum of one blank character space.

I D. Elements in a data field should be displayed in logical order (e.g.

chronological).

E. Presentations of Identical Data

1. Data shall be presented in the way the information will be used by 2 the operator.

2. Within the limits of (1) above, identical data in different presentations shall be displayed in a consistent, standardized manner.

, F. Menu Designators

1. Numbers shall be used as designators when listing selectable items.

If the listing of selectable items contains numbers, alphabetic I characters should be used to prevent confusion.

2. Numerical designators shall start with the number "1" or "101" (not zero).

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3. If used, alphabetic designators shall start with the letter "A".

O. Lists

1. Lists shall be vertically aligned and left-just! fled.

2. Indentation shall be used for subclassifications.

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H. Tables and Graphs - Quantitative data to be scanned and compared shall be presented in either tabular or graphic form.

I. Hyphenation - Hyphenation will be minimized.

J. Alignment I

1. When presented in tabular forla, alphanumeric data shall be I

left-justified.

2. When presented in tabular form, numeric data shall be right-justified with decimal points aligned.

K. Periods shall be placed after item selection designators and at the end of a sentence.

L. The following standardized fields will be used:

1. Telephone Number: (914) 555-l'212

2. Time: HH:MM:SS, HH:MM, MM:SS:(.S) 2 3. Date: DD:MMM:YY M. Data Group Labeling

1. Descriptive titles shall be used for each individual data group or message.

2. Unique characteristics of the content of the data group or message shall be reflected in the selection of labels.

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I N. Labels shall be located in a consistent manner either above or to the left

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of the data group or message they describe. -

O. Labels shall be horizontally (not vertically) oriented.

P. Label liighlighting I 1. Labels shall be highlighted or otherwise accentuated to facilitate operator scanning and recognition.

2. De technique used to highlight labels shall be easily distinguished I from that used to highlight emergency and other critical messages.

Q. When presenting a list of operator options, the label shall reflect the question or choices being posed to the operator.

I Q.5 SCREEN LAYOUT AND STRUCTURING (Ref. NUREG-0700, Section 6.7.2.5)

I Screen layouts and data structure presented on CRTs shall minimize the probability of operator error. We following criteria shall be used to achieve this goal:

A. Displayed data shall be organized in a logical, consistent manner, and shall reflect some obvious and inherent quality of the data groups (e.g.

hierarchical, secuential, or mimic). Plant system displays (P&lD type) 2 shall emulate the main control panels. Where the main control panels do not indicats an obvious directional structure, the layout shall be from left to right and top to bottom.

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B. Consistent physical locations shall be used for specific data groups.

C. Organization and separation of information subgroups shall be made apparent through the use of blank spaces, lines, or some other form of visible demarcation.

D. Lists of options shall be organized according to the probability of selection of each item (high probability items presented first).

E. Non-option lists of equal probability options shall be presented in alphabetical or numerical order.

F. At least one blank line shall be used to separate paragraphs in continuous text.

G. At least one blank space shall be used to separate selection designators from text designators.

H. When multiple pages are used to present data, each page thall display its page number and shall provide an indication of any additional pages in its 2I group which contain data.

I. Items contained in a numbered list and described on " continued" pages shall be numbered relative to the first number on the first page of the list.

J. Operator instructions shall precede the list of options where possible, or shall be provided on the list of menu options to facilitate operator interface.

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K. Urgent messages requiring immediate operator response shall be:

1. Highlighted to attract attention

2. Displayed in the same location L. In systems where selection is made by use of a cursor, formats shall be organized to minimize positioning movements of the cursor.

I M. 'Ihe amount of information-bearing activated screen area shall not exceed 25% of the total screen area (excluding demarcation lines used to I separate data groups).

N. Trend plot scales shall be consistent with the intended functional use of the data .

I Q.6 M ESS AGES (Ref. NUREG-0700, Section 6.7.2.6)

Messages (whether prompts, error messages, or systems feedback) shall conform to the following criteria:

A. Messages shall be concise and provide the information required to complete a specific action or decision sequence.

I B. Information contained in messages shall be necessary, complete, and readily usable.

I C. Prompts shall be used when the operator may need direction or guidance to initiate or complete an action or sequence of actions.

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D. Prompts shall contain clear and specific cues and instructions which are relevant to the action to be taken.

E. Directions shall be in the sequence to be used by the operator.

F. Error messages shall be included for any erroneus or invalid input.

I G. Error messages shall contain instructions regarding required corrective action.

H. Capability shall be provided for individual error correction without g

affecting adjacent valid entries. m I. Feedback messages shall convey system status changes to the operator.

J. When a displayed item is selected as an option or input to a system, the item shall be highlighted, or otherwise positively identified, to indicate acknowledgement by the system.

K. When execution of system functions requires the operator to stand by, such as when the computer is searching for requested data, periodic feedback shall be provided the operator to indicate normal system operation and the reason for delay.

L. When a process or secuence is completed by the system, positive indication shall be provided concerning the outcome of the process and requirements for subsequent operator actions.

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.M. System diagnostic, error and response messages may be displayed either at the top or the bottom of the CRT screen. The CRT location of these 2 messages shall be consistent within each computer display system.

Q.7 GRAPHIC CODING AND HIGHLIGHTING .

(Ref. NUREG-0700, Section 6.7.2.7)

The following criteria shall be applied:

I A. Highlighting shall be used to attract attention to displayed data that are important to actions and decisions.

B. Consistent Approach

1. Highlighting methods shall be consistent among applications.

2. Highlighting methods shall be different for normal and abnormal conditions.

I C. When contrast enhancement is used for highlighting, not more than two brightness levels shall be used in a single presentation.

D. Blinking of a symbol or message shall be used for emergency (or other critical) conditions only.

I E. Blink Rates I 1. No more than two blink rates shall be used.

2. For a single blink rate, the rate shall be 2-3 blinks per second with a minimum of 50 msee "on" time between blinks.

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3. When two blink rates are used, the fast blink shall approximate four per second and the slow rate shall approximate one per second, the on/off ratio shall approximate 50%, and the higher rate shall apply to the most critical information.

F. Image reversal (e.g., dark characters on a light background) shall be used f primarily for dense data fields, such as a wort! or phrase in a paragraph of text, or a set of characters in a table of data.

G. Graphic coding (e.g., boxes, symbols, underlining) shall be used to present standard qualitative information or to draw attention to a particular portion of the display.

H. Graphic codes shall have the same meaning in all applications.

I. When geometric shape (symbol) coding is used, the symbols shall vary widely in shape.

J. Number of Symbols

1. The number of basic symbols used for coding shall not exceed the operator's ability to discriminate among them. 'Ihis will range from

6-20 symbols per display depending on the display conditions (screen 2 gggy),

2. Other highlighting and graphic techniques (e.g., color) shall be used as needed to display different states or qualities of a basic symbob I

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K. Use of Color l

'Ihe following criteria shall be applied to the use of color for CRT display presentations:

1. CRT colors shall be consistent in use and meaning with all other color codes in the control room.

2. Once colors are assigned a specific use or meaning, no other color shall be used for the same purpose.

L. Color Meanings - Where possible, color meanings shall equate with the I commonly understood meanings of those colors. Following are the specific meanings for three colors - red, green, and yellow / amber.

However other meanings of these colors which are commonly understood for control room use are also acceptable.

1. Red - Unsafe, danger, immediate action required, critical parameter value out of tolerance.

2. Green -Safe, no action required, parameter value within tolerance.

3. Yellow / amber - Hazard, potentially unsafe, caution, attention, parameter value marginal.

I M. Red-Green Combinations I 1. Whenever possible, red and green colors shall not be used in combination.

2. Use of red symbols on a green background shall be avoided.

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Q.8 MULTIPLE-PAGE CONSIDER ATIONS (Ref. NUREG-0700, SEction 6.7.2.R)

When it is necessary to include multiple pages, or when scrolling, panning, and zooming of I!

a single page is anticipated, the following criteria will be applied: ,

A. All data relevant to a specific operator entry shall be displayed on a single page, and requirements for operator memory shall be minimized.

B. Location References

1. When scrolling or panning is required, location references shall be provided in the viewable portion of the frame.

2. Sectional coordinates shall be used when large schematics must be panned or magnified.

C. A capability shall exist for controlling the amount, format, and complexity of information displayed by the system.

D. If the message is a variable option list, common elements shall maintain their physical relationship to other recurring elements.

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