ML20236N633

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Nuclear Measurement Analysis & Control DC Wide Range Monitor (NUMAC-DCWRM), Licensing Summary
ML20236N633
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 04/30/1987
From: Reigel D, Robare D
GENERAL ELECTRIC CO.
To:
Shared Package
ML20236N440 List:
References
NEDO-31399, NUDOCS 8711160260
Download: ML20236N633 (34)


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NED0-31399 Class I April 1987 GENERAL ELECTRIC LICENSING

SUMMARY

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l THE NUCLEAR MEASUREMENT ANALYSIS AND CONTROL DC WIDE RANGE MONITOR (NUMAC-DCWRM) 4 Approved: - '

Approvedt M D.W. Reigel, Mit' nager D.J. Robare, Manager Electronic Products Services Licensing NUCLEAR ENERGY BUSINESS OPERATIONS

  • GENERAL ELECTRIC COMPANY SAN JOSE CALIFORNIA 95125 GEN ER AL h, ELECTRIC t

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NED0-31399 DISCLAIMER OF RESPONSIBILITY This document was prepared by or for the General Electric Company.

Neither the General Electric Company nor any of the contributors to this documents A. Makes any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the informa- l tion contained in this document, or that the use of any information-disclosed in this document may not infringe privately owned rights; or B. Assumes any responsibility for liability or damage of any kind which may result from the use of any information disclosed in this document.

The information contained in this report is believed by General Electric to be an accurate and true representation of the facts known, obtained or provided to General Electric at the time this report was prepared.

11

l NEDD-31399 ,

I CONTENTS Page DISCLAIMER OF RESPONSIBILITY 11 ABSTRACT vii

'1.

SUMMARY

AND CONCLUSIONS 1-1 l 1.1 Summary 1-1  ;

1.2 Conclusion' 1-3 '

2. SYSTEM DESCRIPTION 2-1 2.1 Introduction 2-1 2.2 Hardware Configuration 2-1 2.2.1 ' Essential Microcomputer 2-8 2.2.2 High Speed Parallel Data Bus 2-8 2.2.3 Serial Data Link 2-8 2.2.4 Detector Signal Conditioning 2-8 2.2.5 Detector Power Supplies 2-8 2.2.6 Analog Input Signal Conditioning 2-8 2.2.7 Trip and Analog outputa 2-9 2.2.8 Redundant Instrument Power Supplies 2-9 2.2.9 Display Computer and Front Panel 2-9 2.3 Firmware Configuration 2-10 2.3.1 Functional Firmware 2-10 2.3.2 Display Firmware 2-10 2.4 . System Operation 2-10
3. DESIGN CONSIDERATIONS 3-1 3.1 Safety Classification Aspects 3-1 3.2 Instrument Powe.e 3-1 3.2.1 AC Power Input 3-1 3.3 Environmental Considerations 3-1 3.4 Mechanical Design Aspects 3-2 3.4.1 General 3-2 3.4.2 Dimensions 3-2 3.4.3 Weight 3-2 3.4.4 -Modularity 3-3 3.4.5 Mounting 3-3 3.4.6 Chassis 3-3 3.4.7 Front Panel 3-3 3.4.8 Connections 3-3 3.4.9 Color and Finish 3-3 3.5 Electrical Design Aspects 3-4 3.5.1 Measurement Section (Femtoammeter) 3-4 3.5.2 Trip outputo 3-4 3.5.3 Polarizing Power Supply Output 3-5 3.5.4 Other outputs 3-5 3.5.5 Component Grade 3-6 111

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3!6 . User Interface / Controls - 3-6

,'3.6.1- Display l Controller 3-6;

'3.6.21'Iront; Panel. Display 6 J

-~ 3.6 3:; ' Front Panel Operating Keys .3-7' j 3.6.4L(-Keylock Switch .

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3.6.5 - HELP . Systein . 3-9 3.6.6'fRemote Display'. 3-9

['.. 3.7 Conr4Aer! Configuration.- 3-9:

. 3.8 Sel'A'est . Capability - ..

3-9-:

3.9'.: Calibration and operational Tests 9

-3.9.1 Operational Tests; 3-9l

' 4 .' QUALITY ASSURANC~E REQUIRFR NTS' 4-1 4.1 : Design' Verification- 4-1 i 4.2 Product Quality - '4-1 j \

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..5. ' REFERENCES <

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. ILLUSTRATIONS-

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. Figure Title ' :Page 1-1 NUMAC-DCWRM Front Panel '2-3i

, L2-2. 1 Typical'NUMAC-DCWRM Chassis,. Top View' '2-4

~2-3 ., NUMAC-DCWRM Chassis,: Side View. . 2-5 .'

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Simplified NUMAC-DCWRM Functional Block Diagram 2-6' 2-5 Typical-NUMAC-DCWRM~ Displays 2 '

3-1 .NUMAC-DCWRM Remote Display Operator Interface- 3 ,

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NED0-31399 -  ;

ABSTRACT i

This-report describes a microcomputer-based DC Wide Range Monitor- j

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(DCWRM), which is'a member of the Nuclear Measurement Analysis and Control

'(NUMAC)* family of' advanced nuclear instrumentation systems. The NUMAC-DCWRM uses microprocessors and solid-state logic for monitoring intermediate and

-power level' neutron flux ranges of a nuclear reactor.. The instrument includes a Self-Test System (STS) to assure a high degree of availability.

l, Design criteria, performance standards and qualification bases, and-poten'tial applications for the NUMAC-DCWRM are described.

This report is intended to be used with Reference 2, a Licensing Topical Report already reviewed by the NRC, since many of the descriptions in that

' document are applicable here.

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- *NUMAC is a trademark of the Ceneral E1cetric Company.

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1. '

SUMMARY

-AND CONCLUSIONS .j

,i The.DC; Wide Range Monitor (DCWRM).is a member of the Nuclear Measurement t ' Analysis and Control (NUMAC) family of microcomputer-based instruments developed by Genera 1' Electric-Company.(GE) and is designed to monitor the i 1

l'termediate'sud power ranges of'a nuclear reactor. It is a functional and

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physical replacement'for.the existing DCWRMs current 1'y used-in many BWRs.-

a The General. Electric'Compsay undertook the development.of NUMAC instru-  !

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mentation in early-1983 using the established state-of-the art technology.

The-ney product line meets all of the applicable regulatory requirements and l

. improves.the; performance of existing instrumentation. The instrument design  !

'.l concept has. undergone review by the-NRC and.the initial instrument'of the b

family (Log Radiation Monitor) has been approved via a Licensing Topical q Re' port (Reference'2). The instruments use many hardware and software items -l common to each family member. Sections 1 and 2 of Reference 2 provide an overview of these common elements. This report will focus primarily on the

' design' features' unique to the DCWRM and will refer to Reference 2.as applic- d q

able for details of the common NUMAC instrument characteristics.

1.1

SUMMARY

The DCWRM monitors the intermediate and power range neutron fluxes of a 1 reactor by measuring the input current from a neutron sensitive ion chamber. l It is capable of performing the following functions:

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a. Using the input current measurements from a compensated neutron j .

sensitive ion chamber to calculate power, period, rate and trip l margin.

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b. Providing optional flow, pressure and temperature measurement chan-nels for thermal power correction of neutron flux, and flow biasing of trips.

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c. Providing high voltage detector excitation (polarization) power.
d. Providing power / period / rate / margin. output data to remote meters.and' j
recorders, either in analog form or over an optional-RS-232 digital

' data' link. j 1

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e.. Providing alarm, trip and control rod block signals.

f. Automatic self calibration.

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g. Automatic self-testing and alarm, with self-test status displayed on F demand..
h. Providing security against tampering (by password and keylock )

control).

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1.- -Reducing human error through the use of a digital display, menu-  !

driven software, and a simple front' panel design incorporating human factor guidelines.

j. Reducing possibility of inoperable or inadvertent trip outputs by- .i improved calibration and testing techniques.  ;

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k. Supplying both analog and digital outputs for remote meters and .i recorders.

i Section 2 of this report contains a description of the NUMAC-DCWRM System,  !

including hardware, firmware, and system operation. Section 3 discusses the design considerations and performance standards and Section 4 contains the qualification bases (seismic, environmental, and testing) for the system.

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1.2 CONCLUSION

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- The NUMAC-DCWRM nEets all of .the applicable regulatory requirements and.;

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offers 1mproved reliability and performance over prior instrumentation. The!

NRC has already. acknowledged this.for other r. embers of the NUMAC product line l (Reference.2), which'use the same system design concept and most of the same hardware and software as the DCWRM.. Digital circuity.and microprocessor capabilities, together with the self-test system, improve the overa11' accuracy and availability of the neutron instrumentation which enhances nuclear power plant availability,.and safety.

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2. SYSTEM DESCRIPTION l

2.1 INTRODUCTION

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The NUMAC DCWRM monitors the neutron flux levels in the BWR core over the  ;

intermediate and power ranges of operation (IE-7% to 150% of full scale). It j

.is used with a compensated neutron sensitive ion chamber which provides cur-rent, proportional to the flux, to a Femtoammeter input module. A dual -

polcrizing power supply module provides high voltage polarization voltages for excitation of a compensated ion chamber. In some applications, recirculation j flow, steam pressure and flow, and feedwater temperature signals for thermal i power correction of the neutron flux are conditioned by an A/D converter in an analog input module. A functional computer in the DCWRM processes the neutron flux, and, when applicable, flow and temperature signals using modularized, microprocessor controlled hardware and firmware. An operator interface is I

provided which includes a multifunctional " pixel" display having digital and graphical presentations, status, and statistics related to flux, power flow

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and trip margin functions. Analog outputs are provided for external linear flux, log flux, and trip margin meters and recorders. Relay contacts are available for high flux and alarm trips, Figure 2-1 is a functional block diagram of the DCWRM. The DCWRN is a functional replacement for the following instruments in early BWR plants:

o Dual High Voltage Power Supplies (194X445G2) for ion chambers.

e Log N Amplifier (194X447G1), and Picoammeter (194X445G1) for inter-mediate range monitoring.

o Flux Amplifier (693C929G1), Trip Aux Unit (194X451G1) and Relay Module (194X452G2) for power range monitoring.

2.2 HARDWARE CONFIGURATION The NUMAC chassis is a standard 19 in. wide rack-mounted instrument that is slide mounted to permit easy maintenance and module replacement. Printed 2-1

NEDO-31399 circuit boards are housed in a standard card file which has space for a maximum of 15 printed circuit boards. Circuit boards plug into a standard ,

backplane or motherboard containing printed power wiring, ground wiring and the signal / computer bus. Located at the rear of the chassis is a modular connector panel for signal input / output (I/0) and power input. Located at the j i

front of the chassis is the front display panel. The design of the chassis includes features to aid in testing. Every pin and card slot is labeled on the back of the motherboard. Printed circuit boarda are mounted from the top of the chassis to allow quick replacement, if required. The quantity, type and arrangement of circuit boards and rear brackets and connectorb varies with each NUMAC instrument type, whereas the main chassis and motherboard, the display and keyboard assembly, the computer and analog modules, and low voltage power supply modules are common to all types. The NUMAC chasels is illustrated in Figures 2-1 through 2-4 for the DCWRM.

An operator interface is provided for the NUMAC-DCWRM, on the front panel in the form of an electroluminescent display (FID) readout module and a set of opersting keys. In the Operate mode, a set of displays generated by a micro-processor (see Figure 2-5) is available which provides the operator with instrument readings in graphic and digital form, trip settings and status, self-test and calibration data, and other information. In the Inoperable (Inop) mode, the operator can manually reset trips and perform calibration measurements. Function or " menu" keys located under the ELD allow the opera-tor to select displays for performing the necessary functions. Keys in the form of a numeric keypad are available for entering data for trip aettings, etc. An optional read-only remote interface is also available for the opera-tor front panels or benchboarde (see Section 3.6.6).

The NUMAC-DCWRM consists of the following aubsystems and modules arranged I as shown in Figure 2-2: (1) an essential microcomputer; (2) a high speed parallel data bus; (3) a serial data link; (4) neutron detector signal condi-tioning; (5) detector power supplies; (6) analog input signal conditioning; (7) trip and analog outputs; (8) two redundant instrument power supplies; (9) a display microprocessor; and (10) the front panel dispiny. Each 6f these foregoing is described in Subsections 2.2.1 through 2.2.10. Common NUMAC 2-2 l

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Figure 2-2. Typical NtJMAC-DCWRM Chassis, Top View 2-4 ~

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DETAll B C ARD AT SLOT A12 (IF USED) j.

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-*- TO FRONT OF UNIT f DUAL HIGH VOLTAGE . TESTPOINTS .

POWER SUPPLY MODULE }

'#$ HIGH VOLTAGE CONNECTOR DETAIL A CARD AT SLOT A1 TOP COVER i

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Figure 2-3 NUMAC-DCWRM Chassis, Side View 2-5

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DETECTOR SIGNAL - POWER SUPPLIES ANALOG' COMPUTER DETECTOR (HIGH VOLTAGE . . OUTPUTS RECORDER

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(FEMTOAMMETER POWER SUPPLIES (t/O CONTACT --

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' REDUNDANT ESSENTIAL ' ANALOG 120 POWER MICROCOMPUTER INPUT SIGNAL

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CONDITIONING Vac _

SUPPLIES FUNCTIONAL (LOW VOLTAGE REQUIREMENTS - (ANALOG AND '

4 POWER SUPPLY SELF-TEST SYSTEM ISOLATED ANALOG i MODULES) - -

INPUT MODULES)

SERIAL-iI y l'-

' DATA LINK y FROM PROCESS -

DISPuY ' VARIABLE SENSORS, MICROCOMPUTER LOW VOLTAGE .

DISPLAY CONTROL POWER SUPPLIES -

CPU AND MEMORY.

MODULES b'

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OK POWER: 4.00 E 2% TRIP MARGIN: 75% OPERATE  !

VSN//Y NNN///S l l l ll g,00 g.2 1 E7 1E-6 1 E-5 1E 4 iE-3 1E-2 1E 1 1EO 1E1 1E2 POWER (%)

VS/HHHHJA l l l l l 4 l ,s 100 90 80 TO 60 60- 40 30 - 20 10 0 TRIP MARGIN (%)

HELF TRIP / INPUT STATUS SELF-TEST ETC "OPEAATC" MOD 6 - NORMAL OPERAllON, TRIP MARGIN

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OK POWER: 4.00 E 2% TRIP MARGlH: 75% OPERATE POWEf4 PARAMETERS TRIP. SYMBOL SET POINT RESET POINT HYSTERESIS DOWNSCALE ALARM V 5.00 E 7% 5.00 E-7% 0.00%

TRANSFER TO POWER! FLOW 1.00 E 2% 1.00 E 2% 0.00 %

HiALARM 1.05 E 2% 1.05 E 2% 0.00% ,

Hi-HI TRIP 1.20 E 2% 1.20 E 2% 0.00% f DETECTOR SENSITMTY ADJUSTMENT = 1.00 RATED POWER ADJUSTMENT = 1.00 NEXT PAGE EXIT

" OPERATE" MODE - POWER PARAMETERS - DISPLAY l

j (FAULT) POWER: 4.00 E-2% ( * *

  • TR(P * * * ) TRIP MARGIN: 75% OPERATE i PRESENTLY: CYCLE = 45308 RUNNING WITH FAULT BAD A/D A10 LAST FAILURE: CYCLE = 45308 BAD A/D A10 MODULE LOCAllON STATUS MODULE LOCATION STATUS CPU A13 OK t/0 CONTACT A4 OK
  • ANALOG A10 FAULT DISCRIMINATOR A11 OK FEMTOAMMETER A7 OK ISO ANALOG IN A12 OK LVPS LEFT, RIGHT OK DUAL HVPS A1 OK CLEAR LOG EXIT i

" OPERATE" MODE SELF TEST DISPLAY, DETECTING FAULT OK POWER P *

  • TRIP * * *) TRIP MARGIN: (INOP-CAL)

- CALCULATE NEW INTERNAL PARAMETERS FOR THE FEMTOAMMETER CARD -

REMOVE THE VOLTMETER, PRESS "NEXT STEP" IF YOU WISH TO INITIATE AUTO-CALIBRATION OF INTERN AL PARAMETERS. SOURCES PREVIOUSLY CHECKED WILL BE USED DURING THE CALIBRATION. ALLOW APPROXIMATELY SO MINUTES i

NEXT STEP EXIT l

" INOPERABLE" MODE " CALIBRATION" DISPLAY, FEMTOAMMETER Figure 2-5. Typical NUMAC-DCWRM Displays ,

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L NEDO-31399 Lfamily modules,'where already described the Licensing Topical Report,-are f"

referred to the' applicable sections of. Refer <ence 2.-

2.2.'1' Essential Microcomputer ,

i See Section 3.1.1 of Reference 2.- j 2.2.2 High Speed Parallel Data Bus ~  !

See Section 3.1.2 of Reference 2.

2.2.3 Serial Data Link, ,

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See Section 3.1.3 of Reference 2.

"2.2.4 Detector Signal Conditioning i

A Femtoammeter module measures low level detector inputfeurrent and accurately' converts it to a proportional. output voltage for currents over a l range of 1 X 10 -14 to 1.5'X 10

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amps. This module is the same as described in Section 3.1.4 of Reference 2, but is used over a wider input' current' range for the DCWRM.-

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.2.2.5 Detector Power Supplies  !

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A dual high voltage power supply module provides two adjustable polar-iting voltages for the compensated neutron detectors in the range of 450 to 1250 volta.

The four-channel discriminator module, normally used for pulse height

-discrimination with counting detectors, provides two D/A converters, which are driven by the function computer to control the two high voltage power supply output voltage levels.

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-: ,- c NEDo-31399 2.2.6 Analog Input Signal Conditioning An analog module provides A/D conversion of analog inputs, such as low voltage power supply outputs, to a 16-bit digital signal which is sent to a parallel data bus. The essential microcomputer compares the digital readings from the analog module with trip settings to asure that they are within specified values.

An isolated analog input module, used in some versions of the DCWRM, provides 1.1 channels of individual isolation amplifiers for accurate measure-ment of low level process variables. Each isolated signal is multiplexed by the analog module and sent to the parallel data bus. A 500 Hz sine wave gene-rator in the isolated analog input module tests the operability of each j channel. j 2.2.7 Trip and Analog Outputs y An I/O contact module drives five external relays which provide contacts for initiating trips and alarms. The module circuitry monitors the relay coil I

currents so that a comparison with the intended relay status will aid fault location diagnosis in the event of abnormal operation. Relays can optionally be located either on the chassis or externally.

An analog module provides D/A conversion of selected signals from the parallel data bus to analog outputs for remete displays, recorders, the plant process computer, and for auto calibration and the self-testing functions.

See Fafarence 2, Section 3.1.6.

2.2.8. Redundant Instrument Power Supplies See Section 3.1.7 of Reference 2.

2.2.9 Display Computer and Front Panel See Section 3.1.8 of Reference 2.

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2.3 FIRMWARE CONFIGURATION See Section 3.2'of Reference 2.

2.3.1 Functional Firmware 1

See Section 3.2.1 of Reference 2. , i l

.2.3.2 Display Firmware. .

, .I See Section 3.2.2 of Reference 2.

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-2.4 SYSTEM OPERATION ' j, I

'See Section 3.3.of Reference 2 except as noted below. l

}l The instrument display is turned on and off manually by the operator.-  ;

The display is normally left off in the Operate mode to extend. screen life; it will automatically- turn on in the event'of a self-test 1 failure or a trip.

.Whenever.the display is on, instrument reading, trip status and'self-test status are'shown along the: top. The remainder.of.the display will depend on actions selected by the user. ,

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3. DESIGN CONSIDERATIONS l

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, The'NUMAC-DCWRM design is based upon'the_ criteria and requirements

' described in this'Section. Equipment qualification has been performed in i

'l accordance with NRC' approved GE qualification procedures to demonstrate l compliance.

1 3.1 SAFETY CLASSIFICATION ASPECTS The NUMAC instrumentation can perform both safety-related and non-safety-related functions. The DCWRM is qualified to perform on-line safety-related j functions, and also non safety-related operational and surveillance functions in accordance with its performance specifications. If the Self-Test System detects a failure of safety-related functions, it causes a trip (and can sig-nal the plant process computer of the failure).

L I: 3.2 INSTRUMENT POWER l l l

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j See Section 4.2 of Reference 2 except as noted below. I Two types of internal power supplies are provided; a pair of low voltage power supplies (Section 2.2.9) and a dual high voltage power supply (Section f

2.2.4).

3.2.1 AC Power Input for the DCWRM is as follows:

Voltage 120 Vac, +10% l Frequency 47 Hz to 63 Hz Current 0.7 Amperes, max continuous I

3.3 ENVIRONMENTAL CONDITIONS See Section 4.3 of Reference.2, except as noted below. I a

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,rf 500 Khz - 100 Mhz 0 to 5V p-p' steady state:

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C

. Conducted Modet. MI generator connected through large capacitor to 120 Vac power Input lines of instrument to. simulate

. power line EMI.

'R'adiated Mode:. EMI' generator radiating.through 50 ft of terminated  !

paralle1' conductors to signal input / output. lines'of instrument to simulate cable tray radiated EMI.

3.4: MECEANICAL' DESIGN. ASPECTS E3.4.1: General The meelutnical design' of this instrument permits it to replace several-other neutron flux monitoring instruments (Section 2.1).

3.4.2 Dimensions The NUMAC-DCWRM chassis measures 7-in. high by 19-in, wide and is "approximately 17.5-in. deep.

= 3 d.3 Weight

.See Section 4.4.3 of Reference 2.

I 3-2

7 NEDO-31399 JO 3.4.4 Modularity See Section 4.4.4 of Reference 2.

3.4.5 Mounting See Section 4.4.5 of Reference 2.

3.4.6 Chsssis l i

l l

See Section 4.4.6 of Reference 2 except as noted. '

d i

Selected modules (dual high voltage power supply, femtoammeter) have l direct high voltage on sensitive signal connections at the back edge of the module which do not go through the motherboard. j l

3.4.7 Front Panel f

i See Section 4.4.7 of Reference 2.

3.4.8 Connections 'l All external connections are made through connectors mounted on a bracket located at the rear of the instrument with the exception of the detector s

excitation voltages which are obtained directly from a connector on the High l Voltage Power Supply module. The design accommodates both top and bottom I 1

entry cables when the instrument is installed in a panel or cabinet and takes into account the proper bend radii of connecting cables.

3.4.9 Color and Finish 4

See Section 4.4.9 of Reference 2.

1 3-3 .

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_ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ ']

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NEDO-31399 35 ELECTRICAL DESIGN ASPECTS 3 5.1 Measurement Section (Femtoammeter) 3.5.1.1 Sensitivity Sensitivity range is 44E-14 to 1.5E-3 amperes.

I l

3.5.1.2~ Period Based Trip i

A rate-of-increase monitor provides a signal for rod withdrawal and/or scram whenever the rate of core reactivity increase (period) exceeds a reference rate. A dynamic reference period, derived by amplifying and filter-ing the actual period, is compared with the actual period, and when the latter exceeds the former due to a transient, the output signal is provided. The range of the period-based trip is from -30 see to +3 see and is accurate to within 2% of full scale.

3.5.1.3 Accuracy at Recorder Output See Section 4.5 1 3 of Reference 2.

3.5 1.4 Drift The drift is not to exceed 5% of point over a 30-day period following a two-hour stabilization under design center conditions.

3.5.2 Trip outputs See Section 4.5 2 of Reference 2.

3 5.2.2 Displays See Section 4.5.2.10 of Reference 2.

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'r 13.5.2.3" Tr'p Usage: '

'See Section'4.5.2.11'of liefe'ence'2.

r 3.5.'3 Polarizing Power Supply Output  !

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. ,a Each channel'has'a separate dual high voltage power supply'for polarizing 1

~its associated compensated detector. Both sections of each dual supply are' "-

identical except-for the polarity. The characteristics of each' power supply E are as per Reference 2, Section 4.5.3, except as noted. j l

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!: 3.5.3.1 Voltage Range j L l F

450 to 1250 Vdc _+ 10% i 1

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3.5.3.2 'Mailmum Current

1.5 mA over the entire output voltage range.-

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3.5.4 Other Outputs-I 3.5.4.1 Recorder Output  !

Each recorder output'is proportional to the input current.-

Input Current Output

  • i e4E-14 to 1.5E-3 amperes 0 to 1.0 Volt ]

i

  • Typical outputs that may change with specific applications.  ;

3-5

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'3.5.'4.2 . Process. Computer,0utput j m

Each process computer output (whenLrequired) is proportional to the input'

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fcurrent.

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' Input Current- Output

  • e4E-14 to 1.5E-3 amperes. O to 160 mV r.

3.5'.4.3 Remote Meter Output. j .

.l Each remote meter output'is proportional'to the input current. {

i Output *-

Input Current'

e4E-14 to 1.5E-3 ampercs- O to 1-0 mA

'3.5.5 C'omponent ' Grade See Section 4.5.5 of Reference 2.

1; 3.6' USER INTERFACE / CONTROLS-3.6.1L Display Controller j See Section 4.6.1 of Reference 2.

'3.6.2 Front Panel Display The user selects the information to be displayed on the front panel screen'through use of a keypad. The following information is generally avail-L a b'le . Exactly what is displayed will depend upon each specific instrument plant application.

l i

  • T pical. outputs that may change with specific applications.

3-6

-1; ga NEDO-31399'

Th'e display is capable of working in conjunction with the front panel operating = keys as; described in Subsection 4.6.3'of Reference 2.

i

, -I 3.6'.2.1 Types of Information ]

1 i

a. . Percent of full power in alphanumeric-form
b. Percent of ful1~ power in graphic forms (logarithmic and'11near) c.. Period and' Trip Margin in alphanumeric and graphic' forms.

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d. Trip settings and status l i

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e. Polarizing voltage level-  ;

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f. Alarms l l 1 L

g.- .Self-test status j

h. Calibration results
1. - Diagnostic messages i

i

j. HELP messages i

!. 3.6.2.2 Performance See Section 4.6.2.3 of Reference 2. 3 13.6.3 Front Panel Operating Keys ,

k i

See Section 4.6.3 of Reference 2.

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3-7

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NEDO-31399 3.6.4 Keylock Switch See Section 4.6.4 of Reference 2.

3.6.4.1 Operate Mode 1

See Section 4.6.4.1 of Reference 2 except se noted.

l With the switch in the Operate mode, it is in the display mode only and NOT possible to calibrate the instrument or change either trip or polarizing voltage settings. The soft keys are operable just for the selection of alter-nate displays. The user may reset trip displays where appropriate. As long as the instrument is in the Operate mode, the functional computer sends data co the display controller, but not vice versa.

3.6.4.2 Inop Mode When the keylock switch is in the Inop mode, the instrument is capable, on demand, of the followingt

a. Providing the previously specified items under the Operate mode.

Unless otherwise specified for a particular application, the formats need not be the same,

b. Having the trip and polarizing voltage settings changed.
c. Being calibrated.
d. Self-test on a user demand basis.
e. Accepting user selected options.
f. Password protection.

3-8

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3.6.5' HELP System 1

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.l See'Section 4.625 of. Reference-2.-

3.6.6 Remote Display il'

'An optional remote display interface is available for operators should it be^ desirable for WRNMSiinformation to be displayed in front row benchboards.-

)The remote interface'.is read-only and,.therefore, consists of the electro-? i ilitainescent' dioplay and display control logic module,' with function keys only. .

~

Special: displays can.be made up.for the operator that' emphasize critical

'l X ' operational information.- Figure 3-l'is an outline configuration of the-remote .

F display assembly.

. 3.7 COMPUTER' CONFIGURATION.

See Section 4.7 of Reference 2, except that Log-Rad Monitor should be I

'NUMAC-DCWRM..

'i 3.8- SELF-TEST CAPABILITY See Section 4.8 of Reference 2.

13.9 CALIBRATION-AND OPERATIONAL TESTS See Section 4.9 of Reference 2 except as noted.

3.9.1 Operational Tests Tests using internal circuitry can be performed on selected portions of

-the DCWRM to check operability as follows:

a. Trips When the instrument in the Inop mode, an operator selected period trip (ramp) test can be performed under direction of the l

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FUNCTION KEYS

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ELECTROLUMINESCENT DISPLAY FRONT VIEW O' Figure 3 .1. NUMAC-DCliRM Remote Display Operator Interface 3-10

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NEDD-31399 j functional computer to test the trip output circuito. Trips can I

also be tested by operator direct setting of the signal level to check the setpoint.

I

b. Microprocessors: Exercise of the self-test and calibration func-tions demonstrates operability of the microprocessors with high J' confidence.
c. Display: Detailed test can be performed to test the front panel display and keys for proper operation (see Reference 3).

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4; QUALITY ASSURANCE REQUIREMENTS.

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DESIGN VERIFICATION-See Section5.1 of Reference2.:

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-14. 2; PRODUCT-QUALITY l

l See Section'.5.2 of Reference 2.

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5. REFERENCES t
1. "Huclear Energy tosiness Group- Bolling Water Reactor (BWR) Quality Assurance Program Description,'(Revision 4)", General Electric Company,

~

December 31, 1982 (.NEDO-11209-04A)..

.2. "

The Nuclear Measurement' Analysis and Control Logarithm Radiation Monitor i (NUMAC-LRM)" Licensing Topical Report,' General Electric Company, January i

- 1987 (NEDo-30883-A).

-3. Operations and Maintenance. Instructions - NUMAC DC Wide Range' Monitor 304A3711G001", February 1987 (GEK-94857). l i

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