ML20147F306

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CPC Single Channel Qualification Test Rept. Rept Presents Procedures for Static & Dynamic Testing of Assembly Language
ML20147F306
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 09/22/1978
From:
ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:
Shared Package
ML20147F289 List:
References
CEN-071(A)-NP-1, CEN-71(A)-NP-1, NUDOCS 7810190092
Download: ML20147F306 (36)
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Text

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ARKANSAS NUCLEAR ONE - UNIT 2 DOCKET 50-368 , 1 CEN-71( A)-NP l

SUPPLEMENT 1-NP CORE PROTECTION CALCULATOR SINGLE CFIANNEL QUALIFICATION

~

TEST REPORT SEPTEMBER 22, 1978 1'

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COMBUSTI0t1 ENGINEERING, INC. -

NUCLEAR POWER SYSTEMS POWER SYSTEMS GROUP WINDSOR, CONNECTICUT -

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' This.repo. t was prepared as an account of work sponsored by Ccmbustion Engineering, Inc. Neither Combustion Engineering nor any: person acting on its behalf: --

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. a. Makes any viarranty or representation, express 1 or implied including the warranties of. fitness for a -

-!J poicicular purpose or merchantability, with respect

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to the accuracy, cec oleteness, .or.usefulness of the -

-)

information contained in this report, or that the.use -

j of any'information, apoaratus, method, or process dis-closed in this _ report may not. infringe' privately owned

. rights; or ,

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b. Assuces any liebilities with respect to the
  • use of, or for damages resulting from the t.s.) of, any infonnation, appartus, method or process disc'.osed in -

this. report.

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s TABLE OF C'ONTENTS .

TITLE - PAGE NO.

SECTION

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' 6

1. 0 ' INTRODUCTION 9

2.0- SINGLE PARAMETER TEST DESCRIPTION ..

9 2.1 SINGLE PARAMETER ACCEPTANCE' CRITERIA 22 2.2 DYNAMIC CASE.21 TEST PROCEDURE

~24 2.3 - SINGLE PARAMETER TEST RESULTS-3.0' DYNAMIC SOFTWARE VERIFICATION TEST 26 DESCRIPTION.

26-3.1 DSVT' ACCEPTANCE CRITERIA

^31 3.2 DSVT TES

T. PROCEDURE

32'

. 3.3 DSVT TEST-RESULTS 34

4.0 CONCLUSION

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35

5.0 REFERENCES

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TR-48 Adjustments 36 Appendix A

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CPC SINGLE CHANNEL QUALIFICATION TEST REPORT E' SUPPLEMENT 1-P 1.0- INTRODUCTION All- changes to CPC/CEAC algorithm software and data constants mad [^ '

after completion:of design' qualification of the ANO-2 Cycle'I software

' ~

will be performed in accordance with Reference 1. In accordance with NRC Position 10.C, the assembly' language implementation of these changes will undergo static and. dynamic' testing on an "acceptab1e test system". Reference 2 describes'the Windsor Sing]e Channel Test Facility and the verification tests to be performed to verify its acceptability for~ assembly language implementation . testing' of sDftware modifications.

Reference 3 describes' verification tests'that have'been performed to

. ensure the acceptability of the Windsor Single Channel Test Facility for such testing of CPC/CEAC algorithm modifications.

Supplemental Single Channel Qualification testing has been'requ' ired.

The by the NRC in addition to the testing documented in Reference.3.

additional requirements are to define and execute a test program that demonstrates the Sintjle Channel System is a qualified system for:

(a) Testing multi-variable transients,

.(b) Execution of either option on CPC high power selection, and (c) Testing of all interfaces between the CEAC, CPC, and Operators' - - .

Module.

)

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The purpose of this document is to describe the supplemental

-verification testing performed on the test facility and to .

present the results and conclusions of those tests. This report is intended to fulfill all current outstanding testing require _.y .

ments required by the NRC on the Windsor CPC/CEAC Single Channel Facility. /

Multi-variable transient capability has been added to the Single ChannelsystemintheformofaDynamic,SoftwareVerificationlest.

The DSVT is a software test in which portions of the CPC executive and unused core are overlayed in order to process pre-determined time-variaht CPC inputs to the CPC protection algorithms and data '

base. The CPC protection algorithms execute in an identical manner to on-line operation, however the inputs are " ideal" in that they

~

can be synchronized with inputs vs. time that are used in corres-ponding CPC FORTRAN test cases. Thus, uncertainties associated with live analog input signal generation and transmission (signsi generator accuracy and stability, line noise, CPC and signal generator timihg, etc.) are eliminated. All inputs can be made to vary with time, synchronous with the FORTRAN code. The test is similar in concept and structure to the input-sweep test described in Reference 4, in

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that the overlays are used to match CPC and FORTRAN inputs while the protection algorithms and data are unchanged,.and differences in results as compared to FORTRAN are attributable to either machine processing differences or software error.

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1 Qualification testing was-performed on the'DSVT program with the

- execution of five Phase II dynamic test cases'.' The results(of the DSVT test cases were compared to FORTRAN generated acceptance criteria for trip times. ,

Execution of either option on CPC h'igh' power selection is achieved by matching the calibrated neutron flux power to the core thermal-power. This.is perfo'rmed by adjusting the value of the thermal power calibration constant (Point I.D. 068) to'1.0.

All dynamic test cases performed in Reference.3 were re-executed with the thermal power calibration constant equal to 1.0. The results of these' dynamic test cases were compared to FORTRAN generated acceptance criteria

. for trip times.. .

i The qualification testing of CPC/CEAC/0perator's' Module ..c rfaces-

. - is achieved by the. addition of a CEA Calculatorito the Single Channel

- Test Facility. Dynamic test case #21, a non-target CEA drop, was re-executed using the CEAC to go'nerate and transmit the'resulting-

. penalty factor. Acceptance criteria generated by the FORTRAN code was compared with the results of this test. The Operator's Module

- interface with the CPC and CEAC was exercised including check-out -

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t of status lamps, Point I.D.'s, and changes to addressable constants.

- All CPC/CEAC interface modes, were also exercised. - -

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y 2.0~ SINGLE PARAMETER TEST DESCRIPTION The single parameter testing consisted of execution of five single variable transients at nominal 100% power conditions. The transients were executed in order to satisfy the NRC requirements for exeuction of either option on CPC high. power selection and testing of all interfaces between the CPC,CEAC,and Operator'.s Module. /These f6e.

~

-dynamic test cases are described in detail in Reference 3.

Execution of either option an CPC'high power selection was accomplished by setting the thermal power calib' ration constant (P.I.D. 068) equal to 1.0.- The tdsting of all interfaces between the CPC, CEAC,.

and Operator's Module' consisted of verifying all interactions between these components. The verification included checkout of all status lamps on'the operators' module, displaying point _I.D.'s, changing addressable constants, and simulating all modes of penalty' factor . .

4 transmission. ,

i 2.1 SINGLE PARAMETER ACCEPTANCE CRITERIA _

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, 2. 2 - DYNAMIC CASE 21' TEST PROCEDURE

Reference' 3 'contains test procedures for the five dynamic test. cases. -

T The procedure contained below replaces the' procedure in Reference 3 for-Dynamic Case 21. .This ' modification reflects the addition of the :0.EA Calculator'to the t'est.

/

--. (1) Corifigure the hardware per Figure 2.11, e (2) Ensure that the appropriate CPC/CEAC software has been loaded' into the Single Channel. system and is_. functioning properly.

(3) Adjust the CPC System I/0 Simulator for the inputs required by-l

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Table'1.3.6 of Reference 3. ,

. -(4) Adjust the TR-48 analog computer and make the appropriate-connections from the TR-48 to the CPC System I/0 Simu! .t'or jack panel to produce the required ramp rate listed'in Section 1.3 of Reference 3_for Dynamic' Case _21.

Detailed-information-

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concerning TR-48-adjustment and connection for Dynamic Case 21 may be found in Appendix A.

(5) Ensure that the DNBR-(margin) analog output, LPD (margin) analog output, input voltage' ramp, timing signal, and DNBR contact-closure output are connected to the strip chart recorde r (6) Place the strip chart recorder speed selector to 25 mm/sec.

.' (7) Initiate the transient (per Appendix A)- and halt the strip chart recorder at the conclusion of the transient.

(8) Repeatsteps(3)through(7)tentimes. Annotate all strip chart recordings with proper identification including' case number and y ,

- channel allocation and sensitivity.

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- FIGURE 2.11 CPC/CEAC SINGLE CHANNEL TEST FACILITY CPC/CEAC SINGLE CHANNEL- _

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-6 CHANNEL CEA CALCULATOR s OPERATOR'S

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(l CPC I TR-48 CPC SYSTEM 'l ANALOG COMPUTER -I/O-SIMULATOR 7 i i p b __> __ _ J HONEYWELL ACCUDATA 123 ,( FM TAPE

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2.3 SINGl.E- PARAMETER TEST RESul.TS Y The'Lfive dynamic. test cases were executed in accordance with Section'L 3.0.of Reference 3 and Section 2.2 of this document; The trip times

.were' determined from strip chart recordings and'are contained in Table

~

5-2.2. The-. minimum and maximum trip times for each-test case are -

l contained in the folloviing. table. - .

W In a11' cases, the dynamic test results fall within the trip- time acceptance criteria gi~ven in Table 2.1. .

All CPC/CEAC/0perator's Module Interfaces were tested during the single. parameter tests and all interface'c. interactions described in Section 2.0 weretverified.

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SIflGLE PARAMETER TEST RESULTS 4

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3.0- DYNAMIC' SOFTWARE VERIFICATI0ft TEST DESCRIPTI0ft, .

7 ' TheDynamicSoftwareVerificationTest.(DSVT)wasaddedto't.heSingle Channel capabilities:to provide a means of performing multi-variable

' transients. 1 Qualification.of DSVT as a multi-variable test consisted' ,

- of execution of'five dynamic' test cases and comparis6n of the tesE results to FORTRAN generated acceptance criteria. Thefivedynamic test cases were ta':en from the Phase:II test series and' are. described in Tabic 3.1. The acceptance criteria for these test cases consisted of trip times.

' To facilitate the test results data' reduction, the DSVT software automatically records the DNBR and LPD trip times in Point I.D.

locations 098 and 096, respectively. The values. contained in these.

Point I.D. locations produced the test results for each test case.

3.1 DSVT ACCEPTANCE CRITERIA- - .

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/ TABLE 3.1 DY 'AMIC SOFTWARE VERIFICATION TEST '

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. . .=-

PHASE II TEST CASE nr ION CASE NUMBER l

1 4/4 RC Ps . of Flow 3 1/3 RC Pump Loss of Flow 7 - Single Full Length CEA Drop 12 Uncontrolled Sequential CEA Withdrawal 16 Primary Coolant Depressurization e

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TABLE 3.2 h

DSVT ACCEPTANCE CRITERIA *

(without 50 millisecond . interval modification)

.. CASE DNBR Trip Time DNBR Trip Time LPD Trip Time LPD Trip Time

' NUMBER (Minimum) (Maximum) (Minimum) '(Maximum)

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DNOR Trip Time LPD Trip Time LPD Trip Time CASE DNBR Trip Time (Maximum) (Minimum) (Maximum)

NUMBER (Minimum) -

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.- _. . z..: . -.  ; - . _ .. . . . , - . . _ _ .. . _ .--

3.2 DSVT TEST PROCEDURE (1) Ensure that the appropriate CPC software has been loade'd into

(.be Single Channel CPC.

  1. ~

(2) Load the DSVT overlay via the floppy disk.

(3) Insert the DSVT Input disk in the floppy disk drive.

(4) Type the DSVT test case number desired via the tel'etype. .-

(5) Initiate the transient by pushing the white spare button on the operator's module.

Run ehch of the five test cases indicated in Table 3.1. Record (6) the DNBR and LPD trip times contained in Point I.D.'s 098 and 096, respectively. .

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l 3.3 DSVT TEST RESULTS

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.The five DSVT test cases in Table 3.1 were executed according to the procedure contained 'in Section 3.2 Trip times for each case .

were taken from Point I.D. 096 for LPD and Point I.DJ 098 for DNBR.

The results for each bst case are contained in Table 3.4.

For all test cases the test results agree with the FORTRAN generated _

acceptance criteria contained in Table 3.3.

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4.0 CONCLUSION

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- Five single parameter transients have been executed on the Windsor

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Single Channel Test Facility and have demonstrated the execution of either option on CPC high power salction. One of the five test cases exercised the CEAC :PC interface through generation of a penalty _

factor from a simulated CEA drop. Furthur testing was performed to exercise interfaces among the CEAC, CPC, and Operator's Module.

Acceptance criteria for the transient test cases were generated as described in Secti0,n 2.1. ,

For all test cases the test results fall within the acceptance criteria ranges. Consistent with the objectives'in Section 1.1 of Reference 3, the Single Channel Test Facility has been shown to be an acceptable test system for CPC software modifications.

The DSVT qualification tests were executed on the Windsor Single Channel Test Facility. Acceptance criteria for those tests were generated as described in Section 3.1. For all test cases, the test results agree with the acceptance critera. Consistent with the objectivesofSection3.5,DSVThasbeenshowntobean acceptable multi-variable testing mechanism for Phase II testing of software modifications. -

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- 5.0 REFEREftCES (1) CEft-39(A)-P, CPC Protection Algorithm Software Change Procedure, October-1976.

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(2) CEft-40(A)-P, CPC Single Channel System Verification Test, Ociober 1976.

(3)'.CEtt-71(A)-P, Core Protection Calculator Single Channel 2

Qualification Test Report, October 1977. _

(4) CE!1-72(A)-P, Core Protection Calculator System Phase I Design Qualification Test Report, October 1977.

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- APPENDIX A l

A.1 Dynamic Test Case 21 I

Dynamic Test Case 21 is a single CEA drop from 100% withdrawn to _. .

i 100% inserted in 3.0 seconds. The dropped CEA is CEA #1.

(1) Vditage Settings:

P('.1) = 2.C00 v P(24) = 1.000 v P(40) = 3.333 v (2) S(2) = right Push RESET and then OPERATE. Connect (3) Make the above settings.

the output of amplifier 30 to the input of a Honeyweil Accudata 123 amp. Adjust the Honeywell amp for a gain of 5 and.zero offset. Connect the output of the Honeywell amp to h1 ternate input jack J21 on the front panel of the CPC System 1/0 Simulator cabinet.

(4) Place the strip chart speed selector to 25 mm/sec immediately prior

! to initiation of the transient.

(5) The transient is initiated by placing S(2) in the left position.

The initial conditions are reset by placing S(2) in its original position.

i T

Page 36

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