ML20210C677

Rev 2 to Westinghouse Protection Sys Noise Tests

ML20210C677
Person / Time
Site:	Diablo Canyon, South Texas, 05000000
Issue date:	10/31/1975
From:	Katz D, Lipchak J, Marasco F WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML20210C503	List: ML20210C551 ML20210C605 ML20210C626 ML20210C658 ML20210C672 ML20210C677 ML20210C850 ML20210C877 ST-HL-AE-2035, Forwards Responses to Solid State Protection Sys (Ssps) Items Identified in Audit on 870128-30 & Discussion of Noise Fault Testing Performed on Ssps.Supporting Info,Including Correspondence Between PG&E & NRC Also Encl
References
NUDOCS 8705060264
Download: ML20210C677 (125)

Text

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I WESTINGHOUSE PROTECTION SYSTEMS NOISE TESTS

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REVISION 2 October 1975 l

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8705060264 870430 PDR ADOCK 05000498 A PDR

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WESTINGHOUSE PROTECTION SYSTEMS NOISE TESTS

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D. N. Katz F. W. Marasco Reactor Control Systems Reactor Protection Evaluation Systems Integration Nuclear Safety J. B. Lipchak R. M . Siroky Reactor Instrumentation Systems Process Control Systems Systems Integration Electrical Systems Engineering December 1974 i

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TABLE OF CONTENTS WESTINGHOUSE PROTECTION SYSTEMS NOISE TESTS I INTRODUCTION II PROGRAM

1. Planning '

2. Scope f- III TECHNICAL CONSIDERATIONS IV ACCEPTANCE CRITERIA V TESTS -

PROCEDURES & RESULTS Section A - Solid State Protection System Section B - Nuclear Instrumentation System Section C - Process Control System VI CONCLUSIONS ii

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) ACKNOWLEDGEMENTS

$PWR-SD Nuclear Safety and Engineering joined in meeting the Westinghouse commitment to the tests. Successful completion of the tests in the time allowed resulted directly from the close cooperation between all groups as well as the fine efforts of engineers and technicians at Westinghouse Nuclear Instrumen-tation & Control Department (WNICD), Hunt Valley, Maryland and Pacific Gas & Electric (PGE), Diablo Canyon Site-Unit One.

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I INTPODUCTION t'

In the Westinghouse protection systems design, isolation davices are used to provide electrical barriers at circuit locations where information' (signals) used for protective actions are taken off for contrcl functions .

These devices (a) provide isolation between redundant prctection channels where associated control signals are electrically combined (b) prevent electrical faults in the control systems from being fed back to the prctec-tion systems to possibly degrade their operation.

Since control signals are developed from the protection sig:als at the i isolator, the input (protection side) and output (control side) may be in close physical proximity. Design verification testing of the isciators are covered in Westinghouse Topical Reports, WCAP-7819 fer the Nuclear Instrumentation System (NIS) and WCAP-7509L for the Process Control System (PCS)-7100 Series. The verification tests on the Isclation Boards used in the Solid State Protection System (SSPS)is included in this report in the Tests Section. These tests confirmed the isolators' adequacy in each system.

However, since isolator verification tests did not include cabinet wiring, the NRC Staff expressed concerns about the operation of the devices as (i '

installed in the cabinets. The concern was that the electrical wiring, to (input) and from (output) the isolators, because of their close proximity to each other in the as-built equipment, rright permit contrcl-side faults to enter the protection system through input-output electrical coupling. . . .

in effect bypassing the isolator.

To demonstrate the adequacy of the design in this regard, Westinghouse developed a test program to supplement the isolator verification tests in order to assess any effects due to the manner in which isolators were ,

wired in the protection cabinets. ,

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,.. II PROGRAM e~~.

.) 1. PLANNING ,

Several Considerations were taken into account in planning the tests:

(1) Since the tests would be made on as-built, operational instru-mentation, means would be taken to avert component destruction unless essential to maintain test validity.

(2) Credit would be taken for the isolator verification tests during which component destruction acted in some cases to interrupt fault currents. . . .with no affect on the protection side.

(3) Only those faults considered credible would be introduced:

(a) " voltage". . . . . faults applied at the isolator output cables would be limited to voltage levels existing within the cabinets.

(b) " noise" . . . . electrical interference induced or introd-uced into the control cabling would be limited in nature (e.g. frequency and amplitude) to that which could be reasonably assumed because of control cable routing outside the cabinets.

(4) In addition it was decided to test in accordance with the Noise

['3 Susceptibility requirements (parag. 4.6.11) of MIL-N-19900 (B)

(Ships), Military Specifications - Nuclear Propulsion Control and Instrumentation Equipment.

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II PROGRAM (CONT'D) r-7.'. SCOPP.

The scope of the program was designed to provide a realistic assess-ment of the as-built protection systems performance in the presence of noise on the associated control cables.

Table I shows the general test scope and its implementation in the Process Control System (PCS), Solid State Protection System (SSPS) and Nuclear Instrumentation System (NIS). Technical considerations are given in Sections III and V of the report.

TABLE I - NOISE TEST PROGRAM SCOPE NOISE TESTS VOLTAGE INTERFERENCE "

Faults applied Inductor in cuput Magnette inter- ' M ll - N -

at ouput cable loop. . simulate ference - current 19900 cabling inductive transients loop . Noise Sus-where isolator inter- ceptibility rupts fault.

PCS 118 VAC 125 VDC Switched 1 Amp @ 118 per Parag.

250 VDC (2.17 h inductor in VAC randomly 4.6.11 loop) switched SSPS 118 VAC N.A. 1 Amp @ 118 per Parag.

250 VDC VAC . 4.6.11 NIS 118 VAC N.A. 1 Amp @ 118 per Parag.

250 VDC VAC 4.6.11 k_.

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III TECHNICAL CONSIDERATIONS r ~

As noted previously, precautions were taken to prevent equipment damage.

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It was known from tests on the isolators themselves that the protection side (input) was immune to control side (output) fault conditions, including those

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instances where component destruction acted to interrupt the fault. Repetition 1 of tests which set up destruct currents in the isolator output circuits for the q sake of including the isolator wiring was considered unnecessary to evaluate 4

the effect of cable routing. Consequently, output connectors were removed i during fault application, care being taken to avoid changing the physical relationship of the isolator input-output cabling. The isolators were not disconnected during the M11-N-19900 tests.

However, a special 125 VDC test was made on the Proces,s Control System cabinets in which the output connector (external wiring end) was terminated l

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with a 2.17 henry inductor to simulate the inductive component of the isolator output circuit. During application of the fault voltage, the output loop (cabling) containing the inductor was randomly switched to set up conservatively high transients which could result from fault current interruption caused by comp .

onent failure in the PCS isolator output circuits. The isolator input was mon-ltored to determine if the inductive transie'nt was coupled into the adjacent input wiring. The results of these tests are reported in the Tests Section for the Process Control Systems. During fault voltage tests of the Nuclear Instr-l()

' T mentation System and the Solid State Protection System, the loop-closing inductor was unnecessary since the isolator outputs in these systems are not inductive .

As noted previously, the " noise" tests were purposely constrained by reason-l able and realistic considerations. Westinghouse contracted specialists and consultants in the field of electrical interference to advise test engineers concerning potential areas of noise susceptibility in the as-built systems.

Types of noise were . identified and analytical studies made to determine the nature and magnitude of interference that might be induced in control cabling l in the nuclear plant. The calculations considered untwisted control cables running parallel for 30 meters to three-phase conductors carrying 200 amperes.

I The induced loop current was calculated to be only 2.7 micro-amperes in a 100 ohm load. Nevertheless, in each system tested, the disconnected output cable connector (external wiring end) was jumpered and an AC current of 1 ampere was caused to flow in the loop. The isolator input side was monitored. Since the input and output wires to the isolators in the Process Control System cab-inets are closer than those in the other systems tested, it was decided to i randomly switch the 1 ampere AC current. Details of the 1 Ampere Tests are l

covered in the Tests Section. The calculations of the induced loop current are covered in the Tests Section under Process Control System.

l The MIL-N-19900 tests were designed to determine the susceptibtitty of instr-l( umentation systems to noise. Noise was generated by switching AC and DC vii

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III .'Tf/;ilNICAI. CO?I9tl,f;ItATIOP!.'i (rGNT'I))

powers;<l incluctors anal using the noise nource caLic (two, parallel,unchicitie<l conclur; tors) as a raritating antenna which was brought into contact with d the isolators' output ca:,les. These tests were perforrne<! on use 'llest..7.".;se eculptr.ent and the results are reported in the Tests Section.

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IV ACCI'l'TAf.'rl: PRITCPIA

'e In all tests, the acceptance criteria were:

(a) Noise would not degrade the ability of the protection systems to provide the necessary action.

(b) Noise which causes initiation of protective actions, will be reported and evaluated on a case basis.

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t V TESTS - PROCEDURES AND RESULTS f.

) The Tests Section is divided into three reports as shown below:

Section A - Solid State Protection System; Section B - Nuclear Instru-mentation System- Section C - Process Control System (7100). Each section covers procedures and test results.

In order that each of the three sections, i.e. each system testem, might stand alone, the introductory remarks, purposes, etc. prepared by the responsible engineering groups are retained. Itis therefore re-cognized that some general discussions in the report and those in each section are repetitive.

SECTION A - SOLID STATE PROTECTION SYSTEM A Purpose B Test Arrangement C Test Description D Test Procedures E Results Appendix A - Isolation Board Verification Tests SECTION B - NUCLEAR INSTRUMENTATION SYSTEM r '

Discussion and Purpose

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I II Test Anangement III Test Description IV Test. Procedure V Results -

SECTION C - PROCESS CONTROL SYSTEM (7100)

I Purpose II Basis for Tests '

III Acceptance Criteria IV Test Arrangement V Description of Tests VI Conclusion VII General Notes Appendix

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SOLID STATE LOGIC PROTECTION SYSTEM NOISE TESTS f

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October 1974 l

l By: D. N. Katz l

Reactor Control Systems Systems Integration j .

l Section A

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A. Purpose .-

I:.olation device. are m.< d in the Solid State I mM tion Sy:.tein to g.. separate the protective cir;u ts inside the systei. >...binets from non-3 protective or control circuits outside of the cabinets. Pect.ute of the

' ,) clnse i.roxir.ity of isolt.tica ir.put and output wiring, ccncern has hetn expn.. sed that electrical interference or noise picted up on control cablet outtide of the cabinets might transfer to the isolator input cables and potentially result in less of protective action. The purpose of these tests is to sho.i whether or het r.oise picked up on isolator output cables will prevent proper protective action.

j B. Test Arrange. Tent

, A complete Solid State Frstecticn Syster, includira t ain A, train 8, control beard decultiplexer, ccr; uter de:cultiplexer, ana r efabricated interccnnecting cables tere set up as shcan in Figure 1. Bistable ar.d contact inputs were siculated using test tool toggle switches. Two r:3: tor trip breaker unc:ervoltage trip devices sirulatir.g the react 0r trip and bjpass breeters were connected to each train. Each de.tultiplexer was loaded with test tool icrps. Safeguarcs relay contacts were tronitored on te:t tcal larcps.

C. Test Description

1. Susceptibility tests ..ere run in accer ance .:ith "IL-N-19000E, "ilitary 4

Specificatier. .' uciccr Fro;ulsion Centrcl cnd Instrumentaticn E:uipr.ent, General P.ecuirements, paragraoh 4.6.11, Suscertibility. In accordance 4

with the spe:ificatien, the :ssts t.are rar. . tith a 20 fcot antenr.a 1(~ , in contact with the ' deruiticlexer" and "or" caales. These carics carry the output of the isolators to the control b;ard and cor? uter demulti-plexers. T;;o noisc sources i.ere used. Cr.e was a 3 henrj, 5:3 -h:a i

inductance switched on and off of a li5 iC rectifier po.-er s ;;1y fed from the sexe 115 VAC source that suoplies the protection systen. The second was a 10 millihenry, 2 ohm indu;;ance switched on and of f of the 115 VAC source that supplies the protcetion system. These noise

__ sources are required by the specification. -

! Prior to conducting the Noise Susceptibility Tests, the control cable .

sheaths were lifted from ground at both ends. For conservatism the input

( protection ) and outout ( control ) cable harnesses from the isolator 4

were forced into contact and laced tocether to remove all physical separation (several inches) existing in the as built equionent. Photo 1, page 4A shows the output and input cables from the isolator laced together by plastic tubina. Photo 3, pace 48 shows the MIL-fi-199008 wire and output cables taped tooether for a distance of 20 feet. Photo 2, page 48 is a close-up of the f4IL-N-199008 noise source.

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2. ' /.<ldi t ion sl no i' e te<,tt, we re- t un wi t h the i'.ola tion c.:rd'. r < : ufed f r ,::

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the <.y i r o r ,.!,iriot',, the r!, t.iol tip!o xe r . d i .r.ori'.< t led f v n i hs at:d with th< : uis:.ua r.redihlt: vol'. arm , (111: v ,1:: AC i:triTito P' O t,11:.':)

i .ol o t ,r s F. crinnectcd to the ciihis et output ui riri<; of r;:i<. f r.ol :t or.

we re rr r r/cd crid the r r :: ul ti pl <.er , d .' .<.or.r;>-

><! f r or.: t he- . .. b i r l '. :. '>

] cvoid the de:,truction of out.put side ccmp',n'.t.t: of cll i .r,lftDe. .<sipat ci' the destructirin of co;..;eonents on ;.11 demul t iplc xer card:..

tiie isolidors permits dar.ar;c to the output ,ide cc: pencut , wi . . hi<f, valtn<;e conner.ted to the output but proverits <.;w.e to the irt .;t side ,

( p e r, t e c t i c'. . i t'9 ) co: :> on e *.t r. . De. inn : ase . vi.ri f i .etio i te ,t : ,.i (: e Isolatira F.::aro itseli cre covern ; in , ;:r.e'.<:i/ A.

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i 3.1 To check the ef fr ct of ugnetic pickup on isolator input wiring

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resuhing frsn current' flow in isolator out.put wiring, the -isolation -

cardt und t!.e "or" and "denul tiplwer" field cables were di'.connettod

g. .from Ane train, ard one ar;,ere AC was run through the cabir.et isolator output wiring..

4. The high r.eutron flux reactor. trip (low setooint) was selected as representative of'.a typical reactor trip function.in the system. This is a 2/4 trip with a manual block of the trip permitted above the . .

permissive P-10 setootnt. .The permissive P-10 setpoint is establi:hed -

by secarate 2/4 logic in the system. The P-10 setpoint was simulated by tripping two P-10 bistables. Then, the reactor trip breaker and bypass breaker undervoltage device were tripped by tripping two high neutron flux bistables while noise in accordance with paragraphs I.C.1, I.C.2, & I.C.3 was being applied. A successful test was -indi-cated by dropout of all four trip -levers.

5. Reactor trips from both trains were then blocked with the nanual block switches and tripoing was attempted by tripping two high neutron flux bistables while noise was being applied. The purpose of this test was to show whether or not noise could unblock the block. A successful test was indicated by the four trip levers remaining in the untripped position.

6. ~ Containment high pressure which actuates

a. reactor trip ,

b. safety injection -

contain ent isolation 0A (1 c.

d. contain. Tent ventilation isolation feedwater isolation e.

f. turbine and feedwater pump trip and which uses 2/3 logic was selected as a typical safeguards function.

The functions were actuated by tripping two containment pressure bistables. A successful test was indicated by operation of test tool lamps showing that all relay contacts associated with the foregoing functions were actuated and by dropout of the undervoltage device trip levers.

7. The tests described in paragraphs I.C.4, I.C.5, and I.C.6 were run three times each for the test conditions given in paragraphs I.C.1, I.C.2, and I.C.3.

D. Test Procedures

'l. Arrange the MIL-N-199008 noise generator using the 115 VDC rectifier power supply, switch S, and inductance L1 as shown in figure 1.

Place the 20 foot antenna in contact with the "or" cable. Switch the

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intacten.~e on .:nd r f f of the rectifier pr.wer 3.up.ly i.t the rat e r !

e ten on-cff c/cl': . er mihute for a period of two ::.inates.

g~ 2. While the f witchi'ng is taking plate, sicul.:te the pr/.are level

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pc ding to tne P-10 permissive u tpoint by tripping histable ; '. . '. i ti

~) and fiC42M. Verify that noise does not cause a block of the high i neutron flux trip (10w setpoint) in either-train by tripping IP'.abies NC41P and f;C42P and noting that the undervoltage device trip Nr lever arms have changed position.

3. Receat step 1 three times, resetting the trip bar levers of all four devices af ter each trip.

4. Manually block the high neutron flux trip (low setpoint) by rci.untarily rotating the power range block control switches fer train A and train 8 to the block position. Verify that noise does nos ercove the block in either train by tripping bistables NC41M and f;C42M and c.oting that the trip bar levers do not change position.

5. Pe;: eat step 3 three times, making certain that the trip bar levers do not drop out.

6. Actuate safety injection by tripping high containment pressure bistables PB9348 and PE935B. Verify that noi,se did not block the following functions and that they all actuated in both trains as required:

a. reactor trip ,

b. safety injection

c. containment isolation 0 A

d. containcent ventilation isolation

e. feedwater isolation

f. turbine and feedwater pump trip

7. Repeat step 6 three times, resetting functions 6a through 6f af ter each actuation.

8. Arrange the MIL-N-199008 noise generator using the 115 VDC rectifier power supply, switch S, and inductance L1 as shown in figure 1. Place the 20 foot antenna in contact with the "demultiplexer" cable. Switch the inductance on and off of the rectifier power supply at the rate of ten on-off cycles a minute for a period of two minutes.

9. Repeat steps I.D.2 through I.D.7.

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10. Arr6nge *.he M'l '!-10'JGOR noise g':v:rator u*,ing ?. witch 5, and inductance L2 r, shcwn in figure 1., Place the 20 foot antenna in contact with*.he "or" cable. Switch the it. dot tance on and off of F the 115 VAC *,ource at the rate of ten on-9ff cycles a minute for a

, period of 'two mir.;tes.

11. Repeat steps I.D.2 through I.D.7.

12. Arrange the '4!L-f;-199008 noise ge .erator using switch S, and inductance L2 as shswn in figure 1. Place the 20 foot araenna in contact with the "demultiplexer" cable. Switch the inductance en ,.:

off of the 115 VAC source at the rate of ten on-off cycles a minute for a period of two minutes.

13. Repeat steps I.D.2 through I.D.7.

14. Set aside the MIL-fi-19900 noise generators. Disconnect all prefab-ricated cables from train A. Remove isolation cards A503, A504, A505, and A506 from train A.

15. Connect 118 VAC between pins M and RR of connector receptacle J501 (demultiplexer cable receptacle) and repeat steps I.D.2 through I.D.7.

16. Connect (+) 250 VDC on pin M and (-) 250 VDC on pin RR cf connector receptacle J501 and repeat steps I.D.2 through I.D.7.

17. Connect (-) 250 VJC on pin M and ,(+) 250 VCC on pin RR of connector receptacle J501 and repeat steps I.D.2 through I.D.7.

18. Using an extender card plugged into isolation card receptacle XA504, short circuit pins 10 and 17. Run 1.0 amperes AC through pins M and RR of connector J501 and repeat steps I.D.2 through I.D.7.

E. Results

1. Results of the testing show conclusively that electrical interference or noise is not a consideration or concern in the proper operation and functioning of the solid state logic protection system. In all tests, the system pmduced reactor trip and safeguards actuation as required.

No maloperation of the display of system status to the computer and control board through the multiplexing subsystem was observed in any of the tests. It is estimated that electrical interference introduced into the system by the testing was far in excess of any that would be experienced in accual in-plant operation.

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• NUCLEAR R E G U L AT C'H Y C O f.1f 11S SIO ff .

• ~W AS Hite ST ON. D C. 2 015 5 ,

[pD Docket 1os. 50-275 and 54-32J SEP 0 41975 gg /g f-Pacific Cas and Elcetric Co=pany AT'd:  !!r. John C. ::orrissc/ .

Vice President and Cencral Counsel 77 Icale Street -

San Francisco, California 94106 Centiccen:

Enclosed are the results of our revicu of the Ucstinghouse Protection dated Dece bcr 1974, and Suppictent 1, System  : oisc dated February 20, 1975.

Tests Report,This report provided the scope, technical cons,'dcraticas, acceptance criteria, test procedurcs, and results and conclusions for the Westinghouse supplied syste=s.

Our detailed review of the subject report is contained in Enclosure 1 As indicated in

, and reference's used arc _idcatified in Enclosure 2.

our detailed review, ue find the subject report acceptable with the following exceptions: 1) The acceptance critoria must be nodified, and 2) the noise susceptibility tests for the Analog Process Centrol -

Systen cust be nedified 2nd repeated as indicated L.'c reco=cnd that in youtheprcregulatory tide us with

(~ positica portien of the revicu.

a nodilled test progra= for our evaluatica prior to conducting and .

impic=cnting the tests.

In order to proceed Vith our licensing review, please infern us within seven (7) days af ter roccipt of this letter of the schedule you will be able to teet in re'sponding to our concerns regardin'; the subjcat report.

This natter,cust be resolved in an acceptabic er.nner before operating licenses for Diablo Canyon L' nits 1 and 2 can be issued.

Sincerely, b . cn Olan 1). Parr, Chief Light Water Reactors Project Branch 1-3 Division of Reactor Licensing i

Enclosures:

1. Detailed Review of Subject Report j . 2. References

• cc: See pnge 2 .

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ATTACH M EN T A O'* . rk

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• F;cific Cas and Electric Company

-2 SEP 0 4 INS cc: Philip A. Cranc, .~r., Esq.

Pacific Cas and Electric Cocyany 77 Bealc Strcct

. San Francisce, California 94106 Andrew J. Shaff, Esq. '

California Public Utilitics Co=aission

• 350 1:cAllistec Strcct .

San Francisco, California 94102 Hr. Frederich Eissler, President -

Scenic Shoreline Preservation ~ .

Conference, Inc.

4623 ::are ::esa Drive Santa Barbara, California 93105 Ms. Raye Flecing -

. 1746 Cho'rro Street San Luis Obispo, California 93401 *

}h. Sandra A. Silver .

322 S. Plycouth Blvd. .

Los Angcles, California 90020 j Hr. John Forster ,

i 985 Palm Street

! San Luis Obis;io, California 93401 Hr. William P. Cornwell -

- P. O. Box 453 Horro Bay, California 93442 Hr. W. J. Lindblad, Project 'inginect j ' Pacific Cas and Electric Company

- 77 Beale Street San Francisco, California 94106 - -

Mr. Cordon A. Silver

• l 322 S. Plycouth Blvd.

Los Angeles, California 90020 i

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'EVALUATIO:10F o Tl!E 'JESTI :G!!005'E PROTECTi0:1 SYSTEti ;;0ISE TE r 1.0 Summary of P.ecort The subject report was initiated as a result of our ccacerns relating

- . to the qualification of ciectrical isolatien covices, design criteria requiring electrical and chysical reparatica between ;rctecticn and control circuits and "as built" protectica systems it. anity to electrical noise. .

We have indicated in our Safety Evalection Report of the Dir.blo Cany .

• iluclear Pcuer Station, Units 1 & 2, dated 0: cter 15,1972 the CP reviews of both units the :"ysicci and electrical iscicticn ofthat during protecticn and control ucs not ade:uate. anc the imple en:s:icn of tne design presen:od in the FSAR d:es nc coet the requirtter.:s of Secti:ns 4.2, 4.6 and 4.7 cf IEEE Std 279-1971. -

The voltages and test cetnods were selected to cover che credible voi: aces and noise ::r.diticr.s for th2 syste s cs:sc. 'lestingic se cefined the followins ac:e;;ar.cc criteria for al.i tests. .

a.

!!oise $1ould not degrade the ability of the protection systets to provide the necessary at:ica b.

Iloise be uiici causes 6cceptable. initiation of pr:tective acticas, if any, would The test report was divided into three sections covering the follct./n; Westinghouse supplied systems:

Section A Solid State Protectien Syste, (SSFS). f.::endix A of this section contained isola:ica verifica:ic. :ests and results for the li;nt emit:ing diodes (LE:s) used for isolatica in the SSFS. '

Secticn B fluclear Instrumentation System Section C Process Analog System 7100 Series -

Test Descrintions

' The above identified systems were subject to the follcuing tests. .

Representative enannels were energi:cd and the functional cperability checked for each test. .

Noise Susce,tibility Tests - These tests uero run in accordance with

• Hil-li~liiiffff, dated June 7,1960, ljilitary Specificatien - : uclear Propulsion Centrol and Instrumentation Equipecnt, Canaral Requirements, Paragraph 4.G.11, Susceptibility. -

(

WEEmesmuumemut

.I

,'. O_u, taut C::ble Voltan F Wits - The maxinu:a credible voltages (118 Y AC

',and 250 V DC) were a;; pit 0c to cach tysten output cabling to datermine the effect cn the innut sid2. Two additional tests were conducted e . on the Analog Procots Syste,. A 460 V AC fault test and a 125 V DC test suitching a 2.17h inductive load to sirula:e the inductive component of the isolator cutput circuit. The isolator oatput circuits -

.wcre disconnected during the fault tests. The isolctors and connectors have already been cualified for fault voltajes and current: unicn verified c;crability of the input sid2 during cc tructico of cor:cnonts in the cutput porti:n of the isolator. The cu ut ccole voltag2 faui; tests were to varify the adequacy of the cable separation (input /ou put) of the "as built" systems. -

lloonctic :nterf:rence TEs s - These tests vera ccnducted s b1 discennectine -

the output ccales ano intrc u::ing a 113 Y AC pr.:er scur:e and providing a ICO ohn lead at the'c:nnec:cr end to allcu i a pere to finw in the out:ut wiring. The input side of the isolator was ronit: red for induced noise. Since tha ir.pu:/cu put wirin; in :ne ? recess Anaieg Systc= cre closer than the other;systers the 1 ampere AC current was routinely suitched. .

t.icht Erittine Diede ('_ED) Verifica:irn Tests - These tests were conducte: :y tr.:re::::r.; a c:En~ m::: v:. :ps scur:e :s :ne isciati:n board. A 2 Ky de dyninic scur:e and i. uise tests c: 2 %Y peak. i Fh:

ringing dr.n in 6 - 13 cycles a:piied for i r.ir.u: 2. A 1.) V res 53 hz dynamic scur:e was a: plied to the cut:ut side cf the isolater end the input r: nit:r d to c2:er .ine the effe:; of a g33 ru : fault v:1:a;2.

f The tests vers scricr:2d to ca .:ns: rate :ha- :::entic;s c:piied on the ncn-cretecti:n side are not cire::ly ( flasn:.er) or indirec:ly (induced er capacitance) coupiad into the prc;cc: ion logic site.

~ '

The basis for selecting the 1 amp value fcr the magnetic interference tests described abova were based en an ana;y ical study. The calcula .ico considered untuisted ccatrol cables runnin; ;araliei for D ceters with three-phase cer.cuctcrs carryine 233 arr. ores. The in:veed 10cp current was calcula:2d to t: 2.7 =icrc-creeres in a 103 ch: load. The 1 ampere was selected to provida a conserva:ive value for the test.

Test Procedures l'2scricti:n and Results The test report provided detailed test prc:edures and descriptiens fer the tests identified :bove. : estinth ouse su-::rized the results of

• '. the tests for cach of the systems tested. -

2.0 Sumary of Regulatory koview - .

We revicued the datailed test procedures, sctua, description, functional checks and test results for the systems icantificd

• in the sur.:aary of the report. The results of all the tests

conducted indicated that the tests pcrfor.cd did not introduce

interference or noisa from the non-safety to the safety portion of the systca.s. ihe functicnal veri:ic.tica poruen or tne tests

indicated that the equip

:.ent perform.ad as ecsigned, before, during 4

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4 and af ter, tests. The safety functions of the systems were exercised during the tests, f

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• As we have indicated in the sunary of this report, the test program was initiated as a result of our concerns relating to the lack of

• physical separation between the protection and control circuits in the final impleacntation of the system designs unich c:uid result in interaction tectueen control and safety functions. . cs ti r@use has indicated as part of their acces:ance cri:eria that ncise ..hicn causes initiation of protective acticns, if any, w:uld be acce: table.

lle find this criteria unacceptable. IEEE Std 279-1971, recuires that the protection system snall, with precision and relia:ility, auto-matically initiate acprepriate prctective action .,r.enever a c:ndition

. monitored by the system reauies a pr e-set level . The tests cerfor.ed by Westinghouse indicate that the systems are adequate for those tests perforced.

We have concluded that the tests 'and results 'f'cr the Solid State Protection System and the !:uclear Instruren:a:ica Sys:c . are acecuate to demonstrate non-in;eraction of the safety and c:n:rci fun::icns.

However, we have concluded that the noise sus:enticili;y :ss:s fcr the Analog Process Con:rci System are ur. ::c::a:ic. Tre ri airi ; tests and results for the Analo; Process C:ctr:i Sys:5- are :::e :::le. The input and cutput cabling in Ar.aic; Fr::ess C:r.:rol S :a . cc:ine:s are physically in the same wire ways .vith no se:cra:itn. At:iticr.al ragne:ic interference tests were perforcad f:r tre Ar.31:; Fre:ess C:r.rci System and rot the oth:r systcrs. 2:e hcve ccnciu:ed :nc: :ne noise susceptibili:y tests f:r the c her sys s .s were a:e:ua:e due : the fact that physical separation e.:is s an: :he proximi:y of the input /

output cables is for a short distance. ,

.We will require that modified IIIL-::-199::3 ::oise Sus:c :ibility Test Prograns or a new progran be initiated for the Anic; ?rc:ess System which will include the following recuirc-ents. The tes: pr ;ran will include all the provisions or similar recoirc : .ts of .L-5-l's:C2.

i However, the noise . source cu:put c::le stall run in :Pe sa e cable ways, vertical and hori:ontal, as the input /cu: ut cables of the Analog Process Systen for the cis::n:e ccfine: in :ne F:L. 5:ec.

test program. The basis for the 18-inch distance frc- the noise source output cable for the equip:cnt tested in the :4IL-:-19s003 tests is that typical cabicu.sys aboard sni:s are is in:nas wide. f the installed equin.:ent experiences noise interferen:e problens, the source can be detected and serarated by at least a distance of 1S inches.

We utilized IEEE Std 279-1971, " Criteria for Protectica Systens for Nuclear Power Generatir3 Stations," in our revicw of sis ':estingneuse Test Report. Other references used are included in Enclosure 2.

t.

• Regulatory Posi tion We have concluded that the tests and results as documented in the

(- report are acceptabic for the Solid State Protection Systca. the Nuclear Instrunentation Systen. Light lnittino triedes and tne Analog Process Control System with the exception*

of the noisc susceptibility tests.

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4 lle requir'c.,that the acceptance criteria be changed to ir.dicate that noise which ccuses spuricus initiction of a crctection ccticr. cr function vill be identified. If the spuricus trips or initistion of protective actions occur due to lack of separation, we will require a design change to provide adequate separation to climinate the spurious -

opera tions.

l!c require that a codified 141L-li-199003 :;oise Sus:cotibility Test Progrcn or a neu program be initia:cd for the Analog I'reces: Systen, that will ir.clude tne recuircrents ider.:ifica in tne Su- .ary cf /

Regulatory Review portica of this report. - .

je The requis e:unis of Regulatory Guide 1.75, "Fhysical Ir.depe :er.ce _of Electric Systcas" r.:ust be rc.et for any new sys:e . desigr.s ar.: for all designs which ccnstructi n ;ermit c;:lica:icr.s for .. .ic . :he issue date of the Safety Evaluation Report is February 1,1974, or af tur.

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REFERalCES J

1. . Report of Process Instru.r.cntation Isolation Amplifiers, dated liarc*n 28, 1973.

Ucstinghouse Topical !!c:: ort !-! CAP 7/ISEL Solid State Protection System Description, dated January,1971.

Sunmry of Electrical Site Visit and !!eeting !!ald on February 20-22, 1974, dated i-: arch 10, 1974.

Sun:ory of Iboting ::ith ':estinf:auce Electric Corpora tion', dated August 7, 1974. .. ..

Safety Evaluatica P.erort, Diablo Canyon i-:uclear Power Station l'aits 1 and 2, dated Octob r 16, 1974.

Sur.t:ary dated i: arch of_ 5,1975.I4etino held February 6,197'S to discuss separation cr.ci civalificatien, 1EEE Std 279-1971, Criteria for Protection Syste:ns for l:uclear Pc.fer Generatir.; Statica:".

Regulctory Guide 1.75, "Pitysical Independence of Elcctric Syste:.:s , P.evisien i",

dated Jantcry 1975.

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System Did Not System Did Not System Tripped Unblock Operate As As Required As Fequired Required - ,

Describe Syr.ptcrs Trial 1 p.7 s2&3 Trial 2 og ,

Trial 3 pf Trial 1 Og s4&5 Trial 2

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Trial 3 g77 Trial I fg

,s 6 & 7 Trial 2 pg Trial.3. pg _

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Time + . 2 - .* :' ' '~ ~ Observer. 0 5 b) f Section A Page 5

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• f Paragraph 1.D.8 DATA SIWETS Isolation Card 6056023 .

MIL-N-19900 rectifier pcuer supply noise generator (shields lifted from chassis on "or" & both demult.iplexer adjacent to derultiplexer cable cables)

System Did Not System Did Not System Tripped Unblock Operate As As Required As Jtequired Required -

Describe Symptoms '

Trial 1 C/e*

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ps 2 & 3 Trial 2 fg Trial 3 si,'

f Trial 1 og ps*bS l-fa1 2 ,g Trial 3 ,,

Trial 1 ,

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Trial 2

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Date /'b:~/53~ Timez- 2 '0 ? #'" observer 0 X SA A

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Section A Page 6 P

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Paragraph 1.D.10 NATA sums Isolation Card 6056D23 MIL-fi-19900 suitch - inductor noise qcr.crator (shields lifted from chassis on adjacent to "cr" cable "or" & both demultiplexer Cables)

System Did Hot System Did flot System Tripped Unblock Operate As As Required Asftequired Required -

Describe Symptoms Trial 1 C.r

ps 2'& 3 Trial 2 (fr 2

Trial 3 per Trial 1 ON i ps 4 & 5 Trial 2 gg Trial 3 g,r Trial I ver P -

ps 6,& 7 Trial 2 g,.,.

Trial 3 f,,,

ga te . A </,s- Time se ce /~ observer / h C ' I'~ - - -

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cAit. SHEEis Isolation Card 6056023 nrt.n-ismo switch - inductor noise ocncrator ds li ned kom chassis on adjacent to de.-altiplercr cable (gy&

Or both demultiplexer cables)

System Old f;ot System Did !;ot System Tripped Unblock 0; crate As As Required As Jtequired Required -

Cescrite Syeptoms Trial 1 gg i

s2&3 Trial 2 # 'r

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Section A Page 8 e

PARAGRAPH I.D.15 ,,_

TEST OFSCRIPT10N f

High voltage. (118 VAC) connected to isolator output cable Sn!EM TRlePLD SY$itti 910 t{Uf SYSltt! U!D TiU AS P.EQUIF.ED Uf! BLOCK AS OPEPATE AS REOUIRED REQUIRED

' DESCRIBE Si!'.PT0rt

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Trial 3 fg Trial 1 g STEPS 4&5 .

Trial 2 gg irial 3 -

pg Trial 1 gg t'S 6&7 Trial 2 gg ,

Trial 3 of I

DATE //to 7A TIl1E 7.'#7 Ap OBSERVEP. Sf, h

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Section \ page 9

PARAGRAPH 1.D.16 ,,,,

TEST OFSCRIPTTON f

High voltage (+250 VDC) connected to isolator output cable sidler 4 TklePLD SY.Nitti Diu NVI bY5ith U!U NU UiBLOCK AS OPERATE AS AS REQUIF.ED REQUIRED REQUIRED

' DESCRICE Si!!PT0it 5TLIS 2&3 Trial 1 h

Trial 2 gg Trial 3 gg ,

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Trial 1 pg STEPS 4 & 5 Trial 2 g

' trial 3 -

,g Trial 1 #(

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Trial 3 l

pg DATE f/bo~/7A Til1E f f f.5 Aw OBSERVER [ M [ M I ,

Section A nage 10

PARAGRAPH I.D.17 ,,

TEST DFSCRIPTION

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High voltage (-250 VDC) connected to isolator output cable -

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561Ed TRlrPLD $YSitti DID NUI SYSltf1 U1D NU AS REQUIRED UTBLOCK AS OPEPATE AS REQUIRED REQUIRED DESCRICE Si!iPT0ft Trial 1

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Trial 2 ' gg -

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Trial 1 Og

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DATE f/25-///- TIl1E f

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.qection A page 11 l

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PARAGRAPH I . D.18 .-

TEST DFSCRIPTIO!!

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One ampere AC through isolator output wires

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s niEM TRlWLD SY.ATt'1010 tW( bYSl Lf1 U!U IF.I AS REQUIRED UtiSLOCK AS OPERATE AS REQUIRED REQUIRED -

DESCRICE 5)!!PT0it

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Trial 3 pg ,

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Trial 1 .

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Trial 2 pg

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.,6&7 Trial 2 pg ,

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MIL.N.19900D(SHIPS) 7 June 1960 SUPER SEDING MIL.N-19900A(SHIPS) 15 August 1958 MILITARY SPECIFICATION NUCLEAR PROPULSION CONTROL AND INSTRUMENTATION EQUIPMENT. GENER AL REQUIREMENTS

1. SCOPE (a) Control of the rate of nuclear fission with.

. in the reactor.

l. I Scope. . This specification estab! r;ies the (b) Control of primary coolant flow, general requirements for design, manufacturing. (c) Control of steam cycle incluo.. g control of steam flow, throttle:. cor.densate and operating conditions and acceptance inspection for nuclear propulsion control as d instrumentation - Te'ed.

equipment used in Naval ships. (d) Control of Reactor Plant Auxiliary Systems such as reactor plant valve control, pres.

1.2 Qvironment classificatwn. . Nuclear pro. surising and desassifying. coolant purift.

pulsion control and instrumentation equipment shall cation or coolant charging.

be capable of operation in the following environments. (e) All instrumentation needed to monitor or as* specihed in the individual equipment specification: produce control signals or alarms for the above.

.A. Equipment in contact with primary coolant: 1.3.2 Accessory. . An accessory is a part, sub.

A.I Equipment within reactor pressure assembly or assembly designed for use in conjunction w e sel. with or to supplement another assembly, or set, con.

A.2 Equipment within primary shield tributing to the effectiveness thereof without extend.

but outside reactor pressure ing or varying the basic function of the assembly or

i. s

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A-3 Equipment in reactor compartment within the secondary shield.

A4 Equipment outside the secondary set. An accessory may be used for testing. adjust.

ing or calibrating purposes. (Examples : Headphones for a pump monitor which is supplied with a level shield. meter.. a bridge for calibration of rod position indi.

,,g,,,,

B. Equipment not in contact with primary coolant: 1. 3. 3 Accuracy. . Accuracy is a number or quan.

B.I Equipment within reactor pressurag ity defining the inmit of error as the difference be.

vessel. tween the value of the indicated or observed para.

B.2 Equipm ent within p rirnary shield but meter and the actual value, expressed either in umts outside reactor pressure vessel. of the parameter. in percent of the instrument range.

B.3 Equipment in reartor compartment or as a percent of the true parameter value.

within the secondary shield.

C. All other equipment 1.3.3.1 Accuracy, initial . Initial accuracy is determined under reference conditions of measure.

l. 3 Dehnitions. . To avoid confusion, uniform ment prior to the action of degenerative influences, usage of technical terms is necessary. Terms listed herein shall be used with the meaning indicated, in 1. 3. 3. 2 Accuracy, overall. . Overall accuracy individual equipment specifications correspondence is the maximum error due to any combination of and reports related to the equipment. Terminology normal operating conditions (see 3.2 and 3. 3.1).

not listed herein shall be consistent with ASME Standard 105 Automatic Control Terminology and 1. 3. 4 .Mosembly. . An as sembly is a number American Standards Association Standard NI. I of parts or subassemblies or any combination Glossary of Terms in Nuclear Science and Technol. thereof joined together to perform a sgiecific func.

ogy. tion. (Example s: Pulse rate computer, instru.

ment drawer. ) hig. . The distinction between

1. 3.1 Nuclear propulsion control and instrumen. an assembly and s subassembly is not always latian couipment. . Nuclear propulsion control and exact - an assembly in one instance may be a instrumentation equipment, which in this specifica. subassembly in another where it forms a portion tion shall be refer red to as " equipment" or "this of an assembly, eq uipm e nt. includes in general, all devices includ.

ing electrical, electronic, mechanical hydraulic. . L. 3. 5 Averate musurement. . Average. meas.

and electromechanical apparatus which are associat- urement (temperature, pressure. Dow, liquid lev.

ed with a nuclear reactor for safety, measurement, el) is arithmetic mean of two or more simultaneous or control. including the following (see 6.3): measurements of like parameter.*  %

/

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F, I

i- Section A page 14

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In contact with tv e.1. -e. ! e *. rat rol s I'.f di e'l or the f r a.r.1 p riel of the f*

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• e r % s e :. . a r e e, .t gmt o n e ,.. t,1 y . c a ble. The rion e wurr

• s l.:a = ball La 2 ;. rallel r r,nduc to r, unshi. Id. rf r able. The ir.; it r.d outpat

4. 6. 7.1 P rt s t , ?>* inta r*.

• anced

~

• The approv ed c tb!ct shall tic r.,f t he t a rr.c ty;.e s a s u sed f a.r s h:p.

te.: ,re.sr!Er's s'h'elEce nt.Etc all g7tts to he .r.te r. le.a rd at.r.! sc at sor.. Th* rn th ' cf te rm:n t. ;t the c ) :.; e ef. T r..s s he:i .nc li.de t Ira st the fol!ser.p c ahlc shall be sp".ifier! :n th* > etaiteet te r.t ;. rot e.

d.re, f.! I:v t tr mi;e,r.de tor.

It,) f c h pa rt .Lne tale rance :n c rat. cal in 4. 6.11. 2 The r e , h :. be t . 2 ros sa: sources.s reg rd to c trr uit operation. sh2wTi or. f e;ur e !! . E s e m ; .rt c l':.. I arm t he (c) l'atn indiv; dually selected part (see epipmer.t shall te enermed from the same a.c.

3.7.3.2), a,arce. The noise sh$!; te ger.erated by o;.eratirg (d) Each set of matched parts (see 3.7. 3.2). switch SI at the rate of tu. cr..off cy le s a rninute fer a period of r..t le s s . m * . c m tm.t e s to d e t e r .

4. 6. 8 T rar.sie-nt voltaae and f recuancy. - The rdne that the equ.;mc t matti tne requirements e ;.:;,r .ent'U.i.! be te atro to cetihr.ir.e cor formance s pecified in the arcas i;. r! eq . ;.mer.: s pe c if.c ation, w;tt. 1. 1.1.3. The method of gene rating the applied This shal: 1,e ripated ' :r.; t e s *, . r c e f ?2. 2.

trans.er.t s ar.! the t.c erance 1:rnats cr. the transients c.hta .r.ed s t.1: be as stipulated in the approved test 4. 6.12 Humid tv f

• e

• f:rur e 121. . Ic..r.; ment procedures. . shall be suQectec to tre ionow.ng cor.d.tior.;r.g ar.d tests:

4. 6.9 Warm uo :me. . The equipment shall be p!.< ed in .c amuser.t temperature of 25* e 5'C. fo r 4. 6.12.1 Con'd.tir nir . . The equ:; ment t hall be a ja re d of r.ct le s s th< r. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> with the equtpment deenergised. ln c r:er te estab :sh a referance sa i r.. r p s e d. The ez;;pment shall then be cr.ergized ccndit3an f ar the r .e s s.r e ment :f op.c r.t:r.g parun.

for th.. peric.d indicated in the it.divid;al equ:;, ment

• eters and a valid tat:s ftr ccmpariscr. of the effect s pe c if:* a t ;:.; Iminedsately folh .n; this period the of the conditionin; to fa;;t c. the corm;.;ete qu.pm er.t ac c ur.c y of 16 e output ar.d of each set point shall be shell be dried at a re!.tc<e hur ;J:ty cf r.st r ore ldeterrn;ned. and shall be within the perforrnance thar. 50 percer.t and a temperat.re c.f att less than limits specified m the individual equ:pmer.t specifi. 40*C., nor more than $0*C.. f:r at icast 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, c at sen. The octttr.g of the adjustments and centrols s6all he as 6;.ccified m the approved test procedure. 4. 6.12. 2 fiefs- re r e e emr e mcet s . . Folloung the condit:actng n;ec une a m % c.14. 3. the equip.

( 4. f,.10 Te-merat;re rise. . Teraperature meas.

.aring el. ten tur n shalf tMTaTed 41 c r:t; cal points ment sha:1 be energ:ced. After a su::stle w.rm.up period to insure stable eperat. n the measurement thre ughsut the equi; ment revering s.,pected " hot 6 of all paramete rs spec:!:ed ir. tr.e app roved test n;.it" areas (! nth ambient and part ter peratures). procedures shall be conducted at plus 25', a 5'C.,

The eq.sipmer.: shall t,e operated continuously at full and $0 e 5 percent relative humidity to indicate the po. r in a constar.t ambient temperature (s 5'C) satisfactory performance of the equipmer.t.

unti! stab!e temperature condition has been reach.

ed. The tenge r.ture at each peirt shall be deter. 4. 6.12. 3 Temp e rature evel: r. . W:th the equip.

. .t .ed to ens.re that the parts mil ope rate within reent deenergizec. : s ha.: tnen ce sub;ected to isve t>. ir .ilov .ble temp rature limit s at the maxtmum 24. hour cycles of temperature variat:sr. c.o-:singsn; cor emn. us design ambient temperature. ~ The log of of approx;mately It hours at r a.xims.m contmuous th:s data shall clearly identify the location of the de s ign ambient tempe rature (e C. ) s pecified in in.

te n.perature detectors, the temperatures measured, d:vidual equipment spec:fication (see 3. 2.1), and ar.d the date .nd time of the measurement. approximately 8 h:ars at plus 25',

• 5'C. The relative humidity shall be mair.tained above a mini.

4. 6.10. I Where potted or vncapsulated subas. murn of 90 percent during the steady state condatrons.

seml-l es are usec, temperature dstectors shall be The transitions between temperatures sha!! be ac.

en beddtd at critical points to insure that the parts complished within the 8. hour period sJ that the time will not eu ced their temperature lirnst at the max. at the high temperature is approximately 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br />.

imum me.tinuous design ambient temperature. Each transition sh.ill not exceed 1 1/2 hours if the These embedded temperature detectors are required equipment remains m the chamber or 15 minute. if

, or.ly in the sucassemblies used in this test. The a two. chamber method as empicyed. The relative sub.issett.blics may be metalled in the equipment or humidity need not be controlled during the transa.

opvr ted as a separate unit for this test. The loca. tion periods. Approximately 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> s after stabili.

tmn of the tan perature detectors in the subasses. . sation during the h:;h temperature and low temper.

blics sh..it he indic ated in the detailed test proce. ature portions of the first or second cycle a dure. sampling of the atmosphere in the chamber shall be made to deti:rmme that the c.*nctations e,f teni.

4. f- ll f4uss eptib:lity. . perature and relatis e humidity specified inbove are uniforrn throughout the chamber.

'4.6.11.1 The equipment shall be operated as 4.6.12. 4 Measurement durir t cycline. . Durmg specifie d an the detailed test procedures *with all in* the second cycW the me.asurements required in put amt output cables run for a d6?tance of twenty 4. 6.12.2 shall be performed at the maumurn con.

62 Section A page 15

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Figure II . Noise sc,urces for susceptability test.

te.w.Is desagr. amb:ar.t temperature f t 5'C.). prior ar.d 5C e5 percer.t relative humidin. any additi:t at to tne dec rease of temperature to 25'C.. with the tests or measurements considerec necessary by equipment remamtre in the chamber. The equip- the Covernment tr. specter shall be made to deter-ment sh.ll be operated for as brief a period as re- mine complete compliar.ce with the requiremer.ts of quired to complete the measurements. A warm-up the individual equipment specification. This re-period may be permitted where previous tests indi- quirement may be saived at the option cf the Ctv-cate a definite period is required for the equipment ernment inspector.

to attam thermal stability.

4. 6.12.6 The equipment shall be carefully es.

4.6.12.4.1 If repairs are required the temper- amir.ed in detail to detect evidences ci physical ature cycling specified an 4. 6.12. 3 shall be re- deterioration. such as cerrosion of metal parts, peated after the necessary repairs have been made. distortion of plastic parts and i . sufficient tubrica.

tion on moving parts. When it is necessary to

4. 6.12. 5 Mea suremer.t s after temnarature . replace parts to obtain satisfactory performa. nee of eveline. - Witnin two hours alter compietton of the the equipment. the failed part or parts shau be five tytics the measurements required in 4. 6.12. 2 analysed to determine the cause of unsatisfactory shall be performed at 25' e 5'C.. with 50 e 5 per- cp e ration. The results of the analyses shall be c ent rel.stive humidity. After completion of these reported with the results of measurements cf the measurrments the dielectric test specified in.4.6. 4 equipmer.t cperating parameters. In each case.

shall be conducted except that the test voltage shall the unsatisfactory parts or materials shall be re.

be 65 percent of that specified in 3. 3.8. l. pla:ed by adequate substitutes.

4.6.12.5.1 Upon completion of the tests and after 4.6.13 Accelerated lifejsee fieure I M. - The remaining inoperative for not less than 12 nor more equipmer.t shalNsubjected to the folGarg co: -

than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at a temperature of plus 25'. e5*C. dationing and tests t 63

( Section A page 16 9

m - -.

APPENDIX A b

ISOLATION BOARD (LED) VERIFICATION TESTS Tests were made on the devices used to isolate the Solid State Protection System trains from computer and control board demultiplexers and from each other. The objective was to confim design requirements that credible electrical faults in interconnections between trains and demultiplexers are isolated from, and do not operationally degrade, the protection system.

Isolation is provided by optically coupled photo-diode pairs which transmit protection system status infomation to other systems yet are innune to electrical faults that could occur in these systems. Westinghouse Topical Report WCAP-7488L provides the design basis infomation for the isolation board, the circuit of which is shown in Figure 1.

The tests showed that potentials applied on the non-protection side of the photo-diodes are not directly (flashover) or indirectly (induced or capaci-tance coupled) into the train protection logic. An as-built board was tested without cabinet wiring harness. Voltages applied at the connector verified the adequacy of the connector pin configuration, printed circuit board clearances and breakdown rating of the photo diode pair (LED). Common i mode dynamic and impulse potentials were applied as shown in Figure 2:

(a 2 KV de dynamic A (b 140v ms 60 hz dynamic (c Impulse tests 0 2 KV peak, 1 mhz ringing down in 6-10 cycles, applied for 1 minute.

No flashover occurred and protection system checks showed complete isolation, circuit integrity and functional perfomance.

Additionally, a destructive test of the detector photo-diode (output side) confirmed that the emitter diode (train side) did not see the destruct voltage through distributed capacitance. The detector diode opened at 140v ms, but the transmitter (scope monitored) was unaffected.

Witnessing Tests:

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NUCLEAR INSTRUMENTATION SYSTEM NOISE SUSCEPTIB,ILITY TESTING November 1974 J.B. Lipchak Reactor Instrumentation Systems Systems Integration SECTION B 4

v . ~ - - - - -

, - - - - - - - + - .

s*

g NUCLEAR INSTRUMEt1TATI0il SYSTEM NOISE SUSCEPTIBILITY TESTING

!. DISCUSSION AND PURPOSE Isolation amplifiers are used in the Nuclear Instrumentation System to separate the redundant protective circuits inside the system racks from non-protective circuits outside of the racks. Concern has been expressed that noise picked up on non-protective cables outside of the rack might result in loss or degradation of the protective Lnction.

The isolation verification results submitted by '4 CAP- 7819did not include the rack wiring and hence, output to inpiit wiring noise coupl-ing was not documented. The purpose of these tests is to orovide documentation that noise possibly picked up on isolation amplifier output cables or fault voltages applied to the output cables will not prevent proper protective action. Testing was done for three basic conditions:

MIL-N-199008 floise Susceptibility Test Credible Voltages Applied to tien-protective Cables AC Current in Control Cables Simulating Magnetic Interference i

II. TEST ARRANGEMEf4T A complete Nuclear Instrumentation System console 'qcluding all drawer

( assemblies and rack wiring was set up with 30-foot, long simulated field cables connected to rack !! terminal boards associated with isolation amplifiers in the source, intermediate and po<er range channels.

Various equipment points were monitored during the fault tests to assure that the protective functions were not adversely affected. A recorder was used to provide a record of " fault" effects on protective i functions.

III. TEST DESCRIPTION 1 Susceptibility tests were run in accordance with MIL-N-199008, Military Specification-Nuclear Propulsien Control and Instrumenta-tion Equipment, General Requirements, paragraph 4.6.11, Suscepti-bility. In accordance with the specification, the tests were run with a 20 foot antenna in contact with the output cable of the isolation amplifiers. Two noise sources were used. One was a 3 henry, 500 ohm inductance switched on and off of a 115 VOC recti-fier power supply fed from the same 115 VAC source that supplia ',

the protection system. The second was a 10 millihenry 2 ohm inductance switened on and off of the 115 VAC source that supplies the protection syster. These noisa sources are required by the specification. ( Photo 1 page 11 shows the noise source cable taped to the simulated field cables for a distance of 20 feet.)

L ficCt. istu 'l Page 1

./

a- . .

HUCLEAR INSTRUMENTATION SYSTEM NOISE SUSCEPTIBILITY TESTING III. _ TEST DESCRIPTION (Continued) 2 In addition, credible fault conditions (118 VAC, 250 VDC) were coupled directly to the isolation amplifier output cables. For these tests the output connector was disconnected from the isolation amplifier to prevent damage to the isolation amplifiers output side components. The isolation amplifier had previously ,

been subjected to fault voltages as reported in WCAP- 7819.

• 3 To check the effect of magnetic pickup on isolator input wiring resulting from current flow in isolator output wirin9, the isolation amplifier output connector was disconnected, and one

. ampere AC was run through the cabinet isolator output wiring.

4 A test signal generator was connected to the source range drawer input to enable stepping the source range input signal from ,

lx103 counts per second (CPS) to 3x105 CPS. The trip bistable (NC101) setpoint was at 3x103 CPS. Proper operation was wrified during the test conditions above.

5. The intermediate range drawer was set up in a similar manner with

( a 10-4 ampere test signal which was stepped to 3x10-4 ampere by switching from the FIXED to VARIABLE T bistable (NC206)hetpointwasat3x10gSTcondition.

The trip amperes. Proper operation was verified during the test conditions above.

6. The power range drawer was setup so that two signal changes could  !

be initiated. The built-in test circuit was used to obtain a step change from 100i; Full Power (FP) to 105: FP and back for checking rate trio bistable functions. An external test signal was used.to l obtain a step change from 100', FP to 101% FP to check the overpower trip bistable function. .

l The power range sensitivity was set for 100 microamperes in each section equivalent to 100', Full Power. Overpower trip bistable setooint at 10lt FP and test signal at 100:; FP. The time constant of the impulse (rate) unit was set at 5 seconds and the associated bistableunits setpoint were differential 5.5 (increasing) and '

differential 4.5 (decreasing) % Full Power. g i

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L -

.Siction u Page 2

m.

.. - .. n . .

{ NUCLEAR INSTRUMENTATION SYSTEM NOISE SUSCEPTIBILITY TESTING III. -TEST DESCRIPTION (Continued) 7 A recorder was used at the various points indicated below to -

record the effect of the induced noise'on significant circuit points.

a. Source Range Level Amplifier Output NM105

b. Intermediate Range Level Amplifier Output NM201

c. Power Range Level Amplifier Output NM310

d. . Power Range Isolation Amplifier Input NM302

e. " " "

Output NM306

f. "

" NM307

g. "

Impulse Unit Output NM311

8. The equipment operation was verified for the test conditions described in A, B, & C for each instrumentation channel.

IV. TEST PROCEDURE 1.

Obtain recordings of all points indicat' e d in Section !!I.7. of this document forreference data without any noise sources or applied faults.-

2. Arrange the MIL-N-199006 noise generator using the 115 VDC power supply and appropriate load and the.20 foot antenna in contact with the simulated field cables. Switch the load on and off the power suppif at the rate of ten on-off cycles per minute for a period of two minutes.

3. While the switching (noise generation) is taking place, monitor the panel lights, indicators and remote loads to verify no adverse affects such as erroneous trips, abnormal signal level indications,etc.

4. Connect the recorder to the source range points and obtain re-cordings during the noise generation. Verify that bistabl,e unit tripped as required while noise is being generated.

5.

Connect the recorder to intermediate range channel monitoring points and obtain recordings for the intermediate range channel while noise is being generated. Verify that histable unit tripped as required while noise is being generated.

L RectLon 3 Page 3

- ~

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. l l

p-l NUCLEAR INSTRUMENTATION SYSTEM NOISE SUSCEPTIBILITY TESTING IV. TESTPROCEDURE(Continued)

6. Connect the recorder to power range level amplifier (NM310) output to obtain recordings when the signal level is stepped from 100% FP to 101% FP while noise is being generated. Verify that bistable unit tripped as required while noise is being generated.

7. Connect the recorder to power range level amplifier (NM310). output to obtain recordings when the signal level is stepped from 105% FP to 100% FP. Verify that bistable unit tripped as required while noise is being generated. In addition, verify that the positive rate bistable unit does not trip during the step change from 100%

FP to 105% FP. Reset the bistable unit (NC301).

8. Connect the recorder to buffer amplifier output (NM306)at rack terminal board points (TB228-1, 2) and to the impulse unit (NM311)

, output and observe these signals while the noise is being generated.

9. Connect the recorder to buffer amplifier output (fM307) at rack terminal board points (TB228-4, 5) and to the isolation amplifier 3 (NM302) input (TP302) and observe.these signals while the noise is f

being generated.

10. Arrange the MIL-N-19900B noise generator using the 115 VAC power source and appropriate test box Ioad input. With the simulated' field cable and 20 feet " antenna" in the same condition as in step 2 above; switch the load on and off the 115 VAC source at the rate of ten on-off cycles per minute for a period of two minutes.

11. Repeat steps 3 through 9.

12. Remove the connector electrically from the following isolation amplifiers in NIS rack II: NM106, NM202, NM302 and NM304.. The connectors should be physically in the same general location as if connected electrically.

13. Remove connector P604 on Flux Deviation drawer and connector P410 on Comparator and Rate drawer to prevent damage to these non-protective circuits. -

14. Connect 118 VAC to the remote load resistor associated with source range isolation amplifier simulated field wires and verify that there is no adverse affect on the channel. Obtain a recording of isolation amplifier input in conjunction with fault application.

Section B Page 4

(\

NUCLEAR INSTRUMENTATION SYSTEM NOISE SUSCEPTIBILITY TESTING

15. Repeat step 14 except apply voltage to remote load resistor associated with intermediate range isolation amplifier.

16. Repeat step 14 except apply voltage to remote load resistor associated with isolation amplifier NM302 on power range drawer.

17. Repeat step 14 except apply voltage to remote load resistor associated with isolation amplifier NM304 on power range drawer.

18. Repeat steps 14 through 17 except use 250 VOC in lieu of 118 VAC.

19. ' Connect jumpers between pins A and C on connectors removed from the isolation amplifiers.

20. Repeat steps 14 through 17 except use 118 VAC voltage source in conjunction with a 118 ohm resistor to develop one ampere AC in the simulated field wires.

V. RESULTS rT Results of the testing show that electrical interference or noise associated with the non-protection output cabling did not degrade the performance of the protection ' functions.

I i =

0 I

I b

Section B Page 5

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Paragraph IV.2 TEST DESCRIPTION: MIL-N-199008 - NOISE SOURCE #1 LEVEL BISTABLE STEP FUNCTION SIGNAL OPERATION 4 Source Range C #' og,_ _

5 Intermediate Range 04 0 /<.

6 -

Power Range C#- d /t.

7 Rate Trips o/r 8 Impulse Unit Output Buffer (NM306) Output dM 9 Buffer (NM307) Output i

Is01ator(NM302) Input o 8- .

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O Paragraph IV.10 TEST DESCRIPTION: MIL-N-199008 - NOISE SOURCE #2 LEVEL BISTABLE STEP FUNCTION SIGNAL OPERATION 4 Source Range gg d/<.

5 Intermediate Range dR OK 6 .

Power Range dA OR 7 Rate Trips -

4R 8 Impulse Unit Output Buffer (NM306) Output d4 9 Buffer (NM307) Output Isolator (NM302) Input 44 .

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Paragraph IV.14-17 TEST DESCRIPTION: 118 VAC Connected to Isolation Amplifier Output Cable LEVEL BISTABLE STEP FUNCTION SIGNAL OPERATION 14 Source Range dX og 15 Intermediate Range og gg 16 Power Range NM302 4k og 17 Power Range NM304 OK- #/d

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e Paragraph IV.18 TEST DESCRIPTION: 250 VDC Connected to Isolation knplifier Output Cable LEVEL BISTABLE STEP FUNCTION SIGNAL OPERATION

14. Source Range d M. 0[C 15 Intermediate Range g [G o4 16 Power Range NM302 oK d5 17 Power Range NM304 o /C 05 ObserverG,dILA cate %hchI

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r-b Paragraph IV.20 TEST DESCRIPTION: One Ampere AC through Isolation Amplifter Output Cable LEVEL BISTABLE STEP FUNCTION SICNAL OPERATION

14. Source Range dM d/C 15 Intermediate Range gg , g, 16 Power Range NM302 og g K, 17 Power Range HM dK dl a

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• l Susceptibility Tests Section B Nge 11 i

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l i PROCESS CONTROL SYSTEMS PROTECTION / CONTROL fe') e' WIRING SEPARATION INTfRFERENCEIMMUNITYTESTS

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l BY: Robert M. Siroky Process Control Systems TESTS DOCUMENTED: October 24 & 25, 1974 f ,)

REPORT PREPARED: Decemtier 6,1974 l TEST SITE: PGE Diablo Canyon, Unit One

m .- ,. _

O OUTLINE --

I. Purpose II. Basis for Tests III. Acceptance Criteria IV. Test Arrangement V. Description of Tests Pre-Test MIL-N-199008 Susceptibility Tests 118 VAC Connected to Isolator Output Wires f 250 VDC Connected to Isolator Output Wires 1 AMP AC Current Flow in Isolator Output Wiring DC Relay Coil in Isolator Output Wiring VI. Conclusion VII. General Notes Independent Tests /Recomended Wiring Techniques Magnitudes and Types of Signals in PCS Rack Wireways Exposed Terminals (I/V Module)

Test Recordings Appendix

~ '

D .

section " page 1

~ '

7, -:-- . . . .. . -

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j

. PROCESS CONTROL SYSTEMS PROTECTION / CONTROL WIRING SEPARATION / INTERFERENCE IMMUNITY TESTS

~

EQU'IPMENT: W 7100 Series I. Purpose The purpose of these tests'was to determine whether or not protection circuitry could be perturbated to the extent that protective action would

- be~ prevented by the pick-up or presence of credible interference on control wiring in close proximity to protection wiring within the Process Control racks. Isolation devices (qualified via W CAP #7509-L) are used in the Process Control Systems 7100 Series equipiiient to " electrically isolate" I the protection circuits inside the Process Control racks from control (i.e. non-protection) circuits outside the cabinets. Because of the close proximity of isolator input and output wiring (protection and control) inside the PCS protection cabinett, concern has been expressed that electrical inter-ference picked-up or present 'in the control wiring could be transferred s to the protection wiring with the potential loss of protection action.

) -

l l . Basis for Tests Interference could be introduced into the circuitry of the type provided in the Process Control Racks either electro-statically or electro-magnetically.

By definition:

_S__tatic Interference is caused by the electric field produced by a

" Voltage Source" being coupled capacitively into the instrument circuit.

Magnetic Interference is caused by the magnetic field produced by a

" Current Flow" through a conductor which results in an opposing current being set-up in an instrument circuit to oppose the magnetic field.

I l Credible voltage sources were determined by considering the rcuting of the output wiring of Process Control isolators and the possible voltages available o in the equipment. Taking into consideration sound wire routing techniques

,. used industry wide' and further delineated via E-EPS-1 (see Appendix A) which J is part of the W Electrical Systems Engineering design criteria presented

.to all users of the W Huclear Steam Supply System the maximum credible v voltages were determined to be:

118 VAC 250 VDC e

(

V Credible current flow was determined by utilizing the services of Dr. F. J.

Young, a recognized expert in the area of magnetic field theory. Dr. Young is p

t Section c page 2

_x_ . .

/

b .

a former employee of H at the Research and Development Center, presently a Professor of Magnetics at the University of Michiga'n and being retained by H as a consultant. Appendix B Contains Dr. Young's analysis and findings.

The analysis provided by Dr. Young concludes a current flow of 2.7 x 10-6

. AtiPS could be induced into the " control wiring" as a result of 200 ampere "

current in a conductor one foot away and running parallel for 30 meters.

A conservative value of one ampere (about 4 x 105 more than the calculated value) was chosen as the test current.

In addition, it was felt that MIL-N-199008, Military Specification - Nuclear Propulsion Control and Instrumentation Equipment - paragraph 4.6.11 Susceptibility would provide additional ^information as to the immunity of the PCS 7100 series equipment protection / control wiring from electrical interference. An edited version of paragraph 4.6.11 appropriate to the equipment under consideration is contained in Appendix G.

Since the isolator used in the PCS 7100 series equipment employs 'a transformer to provide the electrical isolation, it was decided to use an inductance to simulate the action of the isolator as it performs under a fault condition.

The inductive perturbation from the coil (approx. 2 Henries) being switched on and off represents a conservative simulation of the actual conditions re-Q ported in y CAP #7509-L-(approx. 0.5 Henries).

III. Acceptance Criteria

. During the test, the bi-stables in the tested Protection Channels must trip as they did without the interference present. (t0.5%)* Should the test interference cause a protection bi-stable trip, this would be considered satisfactory.

• Accuracy used for the y system design.

IV. Test Arrangement The tests were performed at the Pacific Gas and Electric site, Diablo Canyon -

Unit il on October 24 and 25. The tested circuitry had all field wiring in place as if in normal operation (i.e. as installed). Present for the tests were H Personnel (Pittsburgh and site) and PG&E personnel who assisted throughcut the tests. Detailed test arrangements can be found in Appendix D (Block diagrams)andAppendixE(Photos).

V. Description"of Tests Three protection channels in rack 12 were chosen as the circuits to be tested.

, The channels selected and the rationale used to select them is as follows:

J Section C page 3

i-TEST INSTR'J:C T Cl!ANNELS CHA:lHEL j!O. tut:CTIDH -

416 Loop 1 Reactor Coolant Flow 426 Loop 2 Reactor Coolant Flog 436 Loop 3 Reactor Coolant Flow Rationale for Choosing Test Channels:

1. Thtse channels are adjacent within the PCS rack, therefore, the isolator input and output wiring from these channels runs in close proximity to each other.

2. These channels are simple instrument current loops, yet truly  :

representative of a typical protection channel.

3. These channels are identical, therefore, comparison is very realistic.

Pre-Test In order to establish the behavior of the circuits to be tested in tk.e test

( configuration without the test perturbation present, a prc-test uss nerfcened.

1his was used as the base point in order to cetermine .hother er nct the test perturbation would have any influence at all on the protec-ico circuitry.

The isolator input signal, the isoltaor output signal and the bista% ceput signal of cach channel were wired to a Visicorder (9 signal points) Ic be monitored simultar.tcasly A 1-5 VDC signal was individually rar::ed at i Volt / Min. into one of the test channels while the other two cha*.:els had a constant voltage injected that was slightly below .the bi-stable trio-point value. The 9 points mentioned above were simultaneously recorfsd as the ranp signal was injected and until the bi-stable tripped. The bi-stable 1 trip voltage was nonitored by a Digital Volt Meter and duly noted. This was repeated for each of the three test channels. The test equipment is listed in Appendix C and the detailed test procedure and results of the Pre-Test are included in Appendix F.

Mil-N-199003 Susceptibilitv Tests These tests were run in accordance with the edited version of MIL-N-199008 -

Paragiaph 4.6.11 (see Appendix G). With all wiring in place, these tests the isolator output cabic were run with a 20 foot antenna cable in contact with (control cable) of channel 426. This cable (i.e. the channel 426 control j cable) was chosen since it is between the protection cables of both channels

416 and 426. This can best be seen by referring to Figure 4 of Appendix F.

j As specified in the MIL-N Test, two noise sources were used. One was a 3 henry,

[.

L 500 ohm inductance switched on and off of a 115 VDC rectified power supply and the other was a 10 millihenry, 2 ohm inductcc.ce switched on and off of a 115 VAC supply. Both noise sources used the same AC supply that supplies the protection rack, for this test, the AC used was from Rack 11 (Protection Instrunent Bus $111). The Pre-Test was duplicated (with the noise sources 1 present) as detailed in Appendix G.

. . .- -. - .~ -_ -_ -. _

r . - -

O

/

118 VAC Connected to Isolator Output Wires This tsst was performed by imposing 118 VAC on the isolator output Wiring in channel 426. The isclator output was unplugged, (the isolator itself has already been qualified as previously mentioned). the Control Board meter disconnected and the computer input pad disconnected to avoid damaging.these components, but all wiring was exactly in place. With the 118 VAC present on the control cable, the Pre-Test was repeated, taking all recordings and noting all bistable trip points. In addition, meter readings were taken at the CB and computer input rack (#33) to verify that the 118 VAC was present on the cables. The test voltage was also randomly switched on and off and all Pre-Test steps repeated. Detailed procedure and results can be found in Appendix H.

250 VDC Connected to Isolator Output Wires This test was performed by imposing 250 VDC on the isolator output wiring in channel 426. The set-up and basic procedure was exactly the same as described in the 113 VAC test. Detailed procedure and results can be found in Appendix J.

1 AMP AC Current Flow in the Isolator Output Wiring

. , . This test was performed by using a 100 OHM resistor and 118 VAC to establish

') a current flow of approximately one amp in the isolator output wiring in

/- channel 426. The set-up was primarily the same as described in the ll8VAC test. Detailed procedure and results can be found in Appendix K.

D_C Relay Coil in Isolator Output Wiring This test was performed by connecting a 120 VDC relay coil into the isolator output wiring in channel 426. The set-up, otherwise, was exactly the same as described in the 118 VAC test. Detailed procedure and results can be found in Appendix L.

VI. Conclusion -

Under all tested conditions, the protection circuitry operated as intended.

These tests show conclusively that electrical interference imposed into the isolator output wiring (control wiring) is not a consideration as to the proper operation of the perturbated channel nor any adjacent channels.

/- The recordings verify that the interference imposed into the control wiring is'not induced into the protection wiring even though the wiring is in close proximity to each other. The DVM readings verify that the trip point of the bistables is not affected. The magnitude of the electrical interference introduced into the system and the stringent test procedures far exceed any conditions that would be present in actual plant operation.

The fact that the tests were performed with the rack doors open and the shield ground disconnected on the perturbated channel, exemplify the severity of the test conditions.

Amcem carm a

- ,c. .

f, (

VII. General Hotes Independent Tests / Recommended Wiring Techniques:

A number of independent tests have been conducted and documented (see Appendix M) with each resulting in the same basic recommended wiring technique to combat each type of electrical interference. The recommended .

techniques are shielding and twisting of pairs to effectively reduce or eliminate static and magnetic interference respectively.

All instrumentation field wiring is shielded and twisted pairs are used.

The shield is continuous from the detector on through to the final output and is grounded (earth ground) at one point only.

To add even further conservatism to the tests described herein, the shield ground was removed from the channel into which the electrical interference was imposed. Under actual plant operation, with the shield connected, any electrical interference would be of even lesser concern. The tests described herein verify that even without credit for shield grounding, electrical interference is not induced wire to wire in the protection / control circuits even though these wires are in close proximity within the PCS cabinets.

Q Magnitudes and Types of Signals in PCS Rack Wireways In any PCS W 7100 series rack it is possible to have the following magnitude and types oT signals run together in the same wireway:

1. '4-20 MA

2. 1-5 VDC Separate wireways are provided for the 118 VAC used for the bistable outputs and for powering the rack modules.

The field terminals in the cabinets are arranged such that the 4-20 MA signals are on separate terminal boards on opposite sides of the rack from the 118 VAC signal terminal boards.

Exposed Terminals (I/V Module)

Some of the modules in the W 7100 series are voltage input / current output devices. Thus, throughout the cabinets I/V modules (molded precision resistors) are used' to condition a current signal for a voltage input module.

Some concern was expressed as to the vulnerability of the exposed terminals to pick up interference from perturbations present in the control wiring.

~

- Since the circuits in which the I/V modules are used were recorded with no pick up detected, it is concluded that these exposed terminals do not

((~.') pose any problem as to the concern of protection / control electrical inter-forence. In addition, since the shield ground is carried through the I/V modules (the shield ground is continuous for each circuit) the possibility of any pick-up is eliminated for all practical purposes.

I

__. _ __ j Section C p ge 6

b .

Test Recordings The tests documented herein resulted in over 100 feet of Visicorder chart paper. Due to the volume involved, the difficulty in obtaining good copies, and the questionable value of editing the recordings, none are included in this report. All recordings, however, will be '

retained on an auditable basis by W PWRSD.

Since these recordings are not being provided, these pertinent facts should be noted:

1. For each test run, nine (9) points were simultaneously recorded and they are:

~1.1 The perturbation 1.2 The isolator input signal (protection), of the perturbated channel.

1.3 The bi-stable output of the perturbated channel 1.4 The isolator output signal (control) of one of the adjacent channels 1.5 The isolato.r input signal (protection) of this adjacent channel 1.6 The bi-stable output of this adjacent channel

. 1.7 The isolator output signal (control) of the other adjacent channel 1.8 The isolator input signal (protection) of this adjacent channel (signal ramp) 1.9 The bi-stable output of this adjacent channel.

2. Thirty (30) test runs were made as described herein.

3. The recorder chart speed was set at 0.2 "/sec. except for the first 3-5 seconds of each test at which time it was set to 4" sec. to get an expanded trace of each input.

4. Each run took approximately 2.5 minutes.

5. Each recordingverified that the interference was ~not induced into any adjacent wiring.

i I

i

,Section C page 7

~, -- "

7 O APPENDIX A. E-EPS-1 B. Dr. Young's Analysis C. Test Equipment List D. Test Arrangements - Block Diagrams E. Test Arrangements - Photographs F. Pre-Test Procedure & Results G. MIL-N-199008 - Para. 4.6.11; Edited for use on PCS Equipment

1. Procedure

2. Results - Summary H. 118 VAC Test _

1. Procedure

- 2. Results - Sumary J. 250 VDC Test

,]

~

1.

2.

Procedure Results - Sunmary K. 1 AMP AC Current Test

1. Procedure

2. Results - Sumary L. 120 VDC Relay Coil Test

1. Procedure

2. Results - Sumniary

' M. Independent Tests and Recommended Wiring Techniques f

i t

Sectionr: Pgg3 8

O .

U - APPENDIX A 9

V l -

f.-t.Ph- l ELECTRICAL CIRCUIT PHYSICAL SEPARATION RECOMMENDED DESIGN BASIS The electrical power supply, instrumentation, and control conductors for redundant or back-up circuits of a nuclear plant must have physical separation to preserve the redundancy and to ensure that no single credible event will prevent operation

' of the associated function by means of electrical conductor damage. Criticel a

circuits and functions include power, control and analog instrumentation associated w(

the operation of reactor protection, engineered safeguards, reactor shutdown, residual heat removal systems, and auxiliary feedwater system. Credible events shall include, but not be limited to, the effects of short circuits, pipe rupture, missiles, etc. Such electrical separation required for protection against plant' designed events should be included in the basic plant design.

1.0 General 1.1 Cables of redundant circuits shall be run in separate cable trays, e]

f s conduits, ducts, penetrations, etc.

1.2 Circuits for non-redundant functions should be run in cable trays or conduit separated from those used for redundant circuits. Where this

! can not be accomplished, non-redundant circuits may be run in a cable tray, conduit, etc. assigned to a redundant function. When so

~

j L

routed, it must remain with that particular redundant circuit routing and shall not cross-over to other redundant groups.

1.3 One foot horizontal or three foot vertical separation shall be maintained between cable trays, conduit or annored cables associated with redundant circuits. Greater separation must be considered if redundant circuits are exposed to a common hazard such as flood, pipe whip, oil fire, etc.

l. .

I Section C Appendix A page 1 i'

U'

" ' UD ' * ~4 c-cra-a 1.0 General (Continued)

~

1.4 Where it is impractical for reasons of equipment arrangement to provide separate cable trays, cables of redundant circuits may be isolated by physical barriers, be installed in separate metallic conduit, or consist of suitable armored cables, l.S Power and control conductors rated at 600 volts or below should not be placed in cable trays with conductors rated above 600 volts.

1.6 Analog or other low level type signal conductors shall not be routed in cable trays containing power or control cables. -

1.7 In congested areas, such as under or over the control boards, instrument racks, etc., cable trays and conduits containing redundant circuits shall be identified using permanent markings. The purpose of such markings is to facilitate cable routing identification for future modification or additi'ons.

l'.8 Positive, permanent identification of cables and/or conductors shall be made at all terminal points.

2.0 Specific Systems .

2.1 Reactor Protection System j a. Separate routing shall be maintained for the four basic. protection /

safeguard. channel analog sensing signals, bistable output signals and power supplies'for such systems. The separation of these fou~r channels '

. shall be maintained from sensors to instrumIebt racks to logic system cabinets.

1 <J Section C Appendix A page 2

, . . . . .n- -

t-tra-2.0 Specific Systems (Continued) fe= .

2.1 ReactorProtectionbystem(Continued)

b. Separate routing of the reactor trip signals from the redundant logic system cabinets shall be maintained, and in addition, they should be separated from the four analog channels.

2.2 Enoineered Safeauards System

a. Separate routing shall be maintained for the four basic protection /

~

safeguard analog sensing signals, bistable output signals and power supplies for such systems. The separation of these four channels shall be maintained from sensors to instrument racks to logic system cabinets.

b. Separate routing of the. safeguards actuation signals from the

[ redundant logic system cabinets shall be maintained and shall be separated from the four analog channels.

c. Separate routing of control and power circuits associated with the

" operation of engineered safety featured equipment is required to retain redundancies provided in the system design and power supplies.

2.3 Reactor Shutdown Systems Separate routing of control and power circuits associated with boric acid injection capability is required to retain the redundancies provided in the system design and power supplies.

f.

\ms)

Section C l .

Appendix A page 3 t

r.. ~n u . . . . _x ~ - - -

E-EPS-1 2.0 Specific Systems (Continued) 2.4 Residual Heat Removal System Separate routing of control and power circuits associated with residual heat removal capability is required to retain the redundancies of system design and power supplies. -

~

2.5 Auxiliary Feedwater System Separate routing of control and power circuits associated with auxiliary feedwater capability is required to retain the redundancies of system design and power supplies.

2.6 Reactor Protection System Analog circuits, Paragraph 2.1 (a) and

~

Engineered Safeguards System Analog Circuits, Paragraph 2.2 (a),

may be routed in the same wireways provided circuits have the same characteristics such as power supply and channel identity (I, II, III, orIV).

~

2.7 Power and control conductors for the Engineered Safeguards System, Paragraph 2.2 (b & c) Shutdown Systems, Paragraph 2.3, Residual Heat Removal System, Paragraph 2.4, and Auxiliaiy Feedwater System, .

Paragraph 2.5, may be routed in the sam,e wireways provided circuits l have the same characteristics such as power supply and logic or redundant train identity (A or 8).

3.0 Power Sources These separation criteria also apply to the power supplies for the separate load centers and busses distributing power to redundant components and to j the control of these power supplies.

Section C Appendix A page 4

. . : T=

~ ~

E-EPS-1 4.0 Themal Loading -

Cables in power trays 'should be sized using derating factors listed in IPCEA 2, Publication P 426. For circuits with no maintained spacing in cable trays and where no credit for diversity can be taken, such as pressurizer heater circuits, derating factors consistent with the cable manufacturers recommendations should be applied.

5.0 Physical Loadin_q, To minimize insulation and jacket damage due to the weight of upper

~

cables pressing on lower ones iri trays, the maximum depth of cables in a tray should be limited. A suggested method of detemining the maximum

~

number of cables in a tray is to use 40% fill for control cables and 30%

for power cables with a maximum tray height of 8 inches. -

6.0 Fire Detectors s

Smoke or other high sensitivity detectors should be provided for fire

~

detection and alarm in remote wireways or other unattended areas where

. large concentrations of cables are installed. Adequate' and readily accessable equipment must be available to fight any fire that may occur.

7.0 Process Control System Circuits j

Process Control System circuits requiring separation are identified in the "From - to - List" which defines the termination points of the process control I

j systems circuits.

8.0 Neutron Detector Cables

! Nuclear Instrument System neutron detector cables shall be installed in i accordance with Westinghouse PWR Division Instrumentation and Control

Standards, Section 4.1. This standard enumerates specific separation and installation requirements for these circuits.

9.0 For other systems, the Component Separation List identifies those devices and circuits requiring application of these separation criteria. ,gg;gg,,g

-.n- -

~ - . .p m 3 O

e W

4 APPENDIX B I

1 l

/

4 4

i Restion (c7

/

p i,:stinghouse Electric Corporation nesearenanaceeomacenter Bedan Road PittsburghPar.s)1vania15235 September 24, 1974 Robert Siroky Westinghouse Nuclear Center P.O. Box 355, Bay 310 Pittsburgh, PA 15230

Dear Mr. Siroky:

Enclosed is an analysis of the shielding problem posed by the _

AEC. In the problem considered therein a set of three-phase wires runs t parallel to a loop of wire terminated in a 100-ohn resistor. In order }

to investigate the worst case, the wires are not twisted but are assumed to be positioned as closely together as the insulation >ermits with a one-foot separation between the three-phase wires and t1e loop. The object of the calculation is to determine the current induced in the 3 loop. The three-phase conductors comprise wire of 1.00 inch diameter

,$ covered with 0.11 inch thick insulation. The loop consists of 0.0403 inch wire covered by 0.008 inch insulation. The two circuits run parallel for 30 meters and the three-phase conductors carry 200 amperes. Two different orientations of the loop are considered yielding essentially the same results. Assuming a power line frequency of 60 hertz and using the dimensions given above, the largest induced loop current is 2.7 micro-amps flowing in a 100-ohm load.* Although other circuits (shielded from the 36 line) may parallel the loop no further coupling calculations were made because of the extremely small induced loop current. In my opinion, based on these calculations, any currents induced by the loop current would be harmless.

Sincerely, F. . Yo ng, sultant The resulting formulas are given on a separate page. ,

O&y o.

PROFE S SION AL

/ OR. FREDEmCK J. YOM i CholNE(R kIMI [' section C Appendix B page 1

~.:..=........ ~ -

O, Induced Current Formulas

• Perpendicular loop orientation T - k'5N:,.,fW ',

. .. . [o . . --h + 3 t sdn -

1 I + f h *3 b

+ 2 d.

i '20~ ,

mp 3 is, h + t, .

(+f i +

6)

Parallel loop orientation 7 _

l7.hliw$[ }I i' _

+G +f + !)

1

- - ----- - -- a _ . . _ . -

i tdw f (h+lth~, .y -j where w = 2xf, f = frequency, f, the loop length in meters, Ig the three-phase current, R the total loop resistance, h = 12.61 inches, t jthe loop wire insulation thickness = 0.008 inches, d, the loop wire diameter = 0.0403 inches, and 2a the outside diameter of the three-phase cable = 1.22 inches.

l l

Based on the theory of the vector potential outlined in " Classical Electricity and Magnetism" (Addison-Wesley, Cambridge, Mass.'), see page 136.

l; 1

c N

,. + 0 $ r

,yg......._%+,

B l. FREDERICK J. YION c....

e k.159111

+~ - .. a -

m _ ._ _

m- _. . -,

3 I

l

. \

5 A. Field due to a set of three phase wires.

Below is depicted a set of parallel three phase wires. The outside diameter of each of these wires including insulation is taken as 2a.

The coordinate system is set up as shown below.

• 2a ->

Insulation Three phase line 1 I rm I I rm I l s

g-j j t ,

f\

I r

3 2 l

/ 3, O Perpendicular loop P(x,y) v lf x

W

-~ ;,, j _ _ x -----=-- - -

It is the goal of this section to find the total vector potential existing at point P(x,y) caused by the currents in the set of three phase conductors. It is well known that the vector potential of a line current in two dimensions

• is A

Z" I" (I) where y,= 4x x 10-7 henry / meter, I is the RMS phasor current, a the radius of the conductor and r the distance from the conductor center at which the vector potential is being evaluated to the point P(x,y). The total vector potential at the point P(x,y)due to the set of three phase wires is given by AZ" 2 n ) LO* + O n )/240* + On )/120* (2) in which the phase angles must be considered in order to calculate the phasor value of AZ. Here the radii are given by

{

rj= } (x + a O2 , (y,,)2 r =

2 (x+a + (y+a ) (3) r3" * *Y l

B. The voltage induced in a distcnt loop.

j 1. Perpendicular orientation In this case the loop'is oriented as shown in Figure 2. For simplicity, the three phase conductors are not shown and the coordinates are the same as in Figure 1. The top of the loop

*See W. K. H. Panofsky and M. Phillips Classical Electricity and Magnetism l (Addison-Wesley, Cambridge, Mass.) see page 136, equation (8-33).

l t

is located a distance h from the center of the bottom three phase conductor. The insulation on the loop wire (of wire diameter d ,) is of thickness, gt . The total flux per unit length in the loop is given by f T d T. The results of this integration is unit length

=A Z (X=h+3tj +2d,, y =0) - AZ (x =h+tj , y=0)

~

~

f j

+

"o I RMS I" l+ ( h+3t* +2d" + /5-)2 4w f (1[0,+1/240')

i ,g 2

( .

1+ (h+t .

t h+3tj +2d"

+ 2 in l /120'

. h+t j .

and since 1 LO + 1 /240* = -l /120 this becomes h+3t j+2d 2 \

+ u I o RMS 2 in h+3t j+2dw 2 in I+( a unit length 4w h+t j h+t /120'

( 1+(

• i + /T-)2

(4)

2. Parallel orientation.

In Figure 3 the parallel orientation is depicted. The flux per unit length of loop is given by

+ d d

=A Z (X=h+t j+ , Y=tj +d,) - A Z(X=t+hf,Y=-t-d,)

j j unit length i

or,

, - 23398G3 (a

O f .

h+t i k +/3 )2 +a (t -1+d j w

)2

( ,

$a Do RMS I

, in /2 unit length 4x h dw

, ( +/T)2 , ( i w ,j )2 .

~ d --

h+ti p t j+dw 2 a a In /240*

h+tj +d,

( + /3-)2,(), i w)2 _

. a a d ~

f. [

h+ti Y 2 , (t +d j w 2

= p I (1 /240* - 1 LOO )

o RMS in .

i

)

2

, g , () 1 w)2 _

4- a a d

4,, =

1.73p, Igg 3 /21 0* (

h+ti j

+C+

t 2 ( j+d w a

2 in (5) unit length 4w t j+d

( + /r) + (1- w)2 a a

..._...m_. .

a n Y s

h h + 3tj + d,

+, ,yu dw(( ) {y t

OJ v

/

V x

0 Figure 2 Perpendicular loop t k l n ^ y I

r h

v Q Q d, *

! x=h+tg+7 gv v/

! ~

(

y = -tg -d, y=tg + d, i f x

Figure 3 Parallel loop section 0

~

In each case the voltage induced is given by V=jw, (6)

The circuit is sketched below

• • *** II"*

I = 30 meters I loop m

jl100a loop and clearly V

I loop = E =dWe (7)

R b

I lon C

' w y 6 ~ w- Ne I .

O

/

1 APPENDIX C t

/

/

I o

Section c I W

_- - - . -- -s _ _ - _ _ _

f

. APPENDIX C Test Equipment List EQUIPMENT #(ifavailable)

OR MODEL # AND/0R DESCRIPTION CALIBRATION DATE FURNISHED BY Digital Voltmeter Fluke 6710-8100A Site Calibrated 9/23/74 PGE #117.102.6 Ramp Generator TRF 189819 Site Assem. #6752D01G01 S/N 100 Bistable Output / TRF 189858 Site

• Ramp Cut-off Assem #6752002G01 S/N 6 MIL-N-19900B Test -W NICD W PWR Box and Switch Simpson Meter Model 260 Site Calibration 8/13/74 PGE #100.100.212 Model 260 Site Calibrated 9/24/74 PGE #100.100.171 DC Power Hewlet Packard Supplies Harrison 62078 DC Supplies

1. PGE #718.027.2 Site Model #62075 Serial #7E1325

2. PGE #718.027.1 Site Model #6207B Serial #7E1728 Visicorder Honeywell #1912 Site S/N-19-474 Model 1912-306BR70PTL0000000 Amplifier #161.704.1 Serial #1632

, Calibrated 2/6/74 Section C Anoendix C page 1

m .e _

( APPENDIX C Test Equipment List: (continued)

EQUIPMENT # (if available)

OR MODEL # AND/0R CALIBRATION DATE FURNISHED BY DESCRIPTION DC Relay Cat. #ARD660SR Site Style 56E3928 600 VDC Contacts Model 1253C48G01 - 120 VDC Section C Appendix C page 2

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Section C

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TEST PROCEDURE PRE-TEST TEST DESCRIPTION: PRE-TEST MONITORING & RECORDING OF CHANNELS (Since all recorder connections mentioned below will be required throughout the remainder of the test, it is desirable that they remain connected. Also, the channel test switches mentioned below should remain in the test position until the test is complete. Run recorder wiring out the front of the rack.)

(See Figures 1, 2, 3, 4)

CHANNEL 416:

1PT.1 Connect recorder to ITP-416 [4-20 MA through 250 OHMS 1 to 5 VDC] - Label 1PT.1 - Channel 1 (Note 1) 1PT.2 Connect recorder to R12-TB3 (1,2) [ll8VAC] = Label IPT.2 -

Channel 1 lPT.3 Connect recorder to R12-TBE (1,3) [4-20 MA through.500 OHMS -

2 to 10 VDC] - Label 1PT.3 - Channel . 3 1PT.4 Connect 4-20 MA ramp (1 Volt / Min) signal to test jack 1TJ-416 (Note 2) 1PT.5 Put channel test switch ICT-416 in test position IPT.6 Ramp 4-20 MA Signal and record 1PT.1, IPT.2 and 1PT.3.

O

\ 1PT.7 Using the DVM, determine the bi-stable trip point and write the voltage on Graph 1PT.2.

CHANNEL 426 2PT.1 Connectrecorderto1TP-426[4-20 MA through 250 OHMS -

1 to 5 voc] - Label 2PT.1 - Channel 4 (Note 1) 2PT.2 Connect recorder to R12-TB3 (3,4) [118 VAC] - Label 2PT.2 -

Channel 5 2PT.3 If access to control w' iring is possible (*20 feet external to rack) disconnect wires at CB for 1FI-426 (tape ends to

, preventshorting)andatR33TB-2(1,2,3)(tapeendsto l prevent shorting).

For noise test- If access is not possible, disconnect wires at R12-TBE (8.9.10,11) and run s20 feet of control wiring from R12-TBE (8,10,11) and put on duary load.

Connect recorder to R12-TBE (8.10) [4-20 MA through 500 OHMS

! 2 to 10 VDC]

2PT.4 Connect 4-20 MA ramp signal to test jack 1TJ-426.

1 (Note 2) 2PT.5 Put channel test switch ICT-426 in test position.

2PT.6 Ramp 4-20 MA signal and record 2PT.1, 2PT.2 and 2PT.3.

2PT.7 Using the DVM, detennine the bistable trip point and write the voltage on Graph 2PT.2.

CHANNEL 436:

3PT.1 Connect recorder to 1TP-436 [4-20 MA through 250 OHMS -

1 to 5 VDC] - Label 3PT.1 - Channel 13 (Note 1) 3PT.2 ConnectreccrdertoR12-TB3(5,6)[118 VAC] - Label 3PT.2 -

Channel 14 3PT.3 Connect recorder to R12-TBF (8,10) [4-20 MA through 500 OHMS -

2 to 10 VDC] - Label 3PT.3 - Channel 15 3PT.4 Connect 4-20 MA ramp signal to test jack 1TJ-436 (Note 2) 3PT.5 Put channel test switch ICT-436 in test pcsition.

3PT.6 Ramp 4-20 MA signal and record 3PT.1, 3PT.2 and 3PT.3.

3PT.7 Using the DVM, detennine the bi-stable trip point %nd write the voltage on Graph 3PT.3.

.- ~

/ ._.

DATE BY

' *8 D V -

- 1

7 NOTES:

1. If the annunciator system is in operation, it may be desirable to first disconnect the wires (on the mentioned terminals) that go to the Prot.

logic prior to connecting the recorder. This should cause the annun-ciator to alarm, but it can be acknowledged and would not cause any more confusion in the control room.

CAUTION: If this is done, care will be necessary to insure that all wiring is properly replaced after the test is completed.

2. If the annunciator system is in operation, this will cause a " Channel Test Sequence Violation Alarm." This aiarm should be acknowledged and proceed with the test. ,

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MIL.N.19900D(SHIPS) 7 1un_e 1960 SUPER SEDING MIL N.19900A(SHIPS) 15 August 1954 MILITARY SPECIFICATION NUCl. EAR PROPULSION CONTROL AND INSTRUMENTATION EQUIPMENT. GENCR AL REQUIREMENTS

1. SCOPE 1.1 Scope.. This specification establishes the 1. 3.1 Nuclear propulsion control and instrumen.

general requirements for design, manufacturing, tation equipment. . Nuclear propuisson control and operating conditions and acceptance inspection for instrumentation equipment, which in this specifica.

nuclear propulsion control and instrumentation tion shall be referred to as " equipment" or "this equipment used in Naval shaps, equipment". includes in general. all devices includ.

tag electrical, electronic, mechanacal, hydraulac. .

I. 2 Environment classification. . Nuclear pro. and electromechanical apparatus which are associas.

pulsion control and instrumentation equipment shall ed with a nuclear reactor for safety, measurement, he capable of operation in the following environments, or control. including the fo!!owing (see 6.1);

as specified in the individual equipenent specification:

(a) Control of time rate of nuclear fission with.

A. Equipment in contact with prismary coolant: in the reactor.

A.I Equipment within reactor pressure (b) Control of primary coolant flow.

vessel. (c) Control of steasn cycle including control A.2 Equipment within primary shield of steam flow, throttles, condensate and but outside reactor pressure --- Te'e d.

) vessel. (d) Control of Reactor Plant Auritiary Systems A-3 Equipment in reactor compartment such as reactor plant valve control, pres.

within the secondary shield, surising and desassifying, coolant purift.

A.4 Equipment outside the secondary cation or coolant charging, shield. (e) All instrumentation needed to monitor or

8. Equipment not in contact with primary produce control signals or alarms for coolant: the above.

81 Equipment within reactor pressurag ve o set.

B.2 Equipment within primary shield but outside reactor pressure vessel.

B.3 Equipment in reactor compartment within the secondary shield.

C. 41 other equipment

l. 3 Definitions. . To avoid confusion, uniform usage of technical terms is necessary. Terms listed herein shall be used with the meaning indicated, in individual equipment specificatione, correspondence and reports related to the equipment. Te rminology not listed herein shall be consistent with ASME Standard 105 Automatic Control Termanology and American 54.ndards Association Standard N1. I Glossary of Terms in Nuclear Science and Technet.

ogy.

~

Section C Appendix G page 1

./ 7 c - * ;t:s t ;'rore ' urn, l')90011 and 19900n2

.r.

u tl . . rt. co.ovo sv.s ss et.s i r . .. . e. , o s* . U I e .. r ! #1;.G f

T M I e . ti . l *r o Gai.1:.l1ll N

- l's August l'sL8 Mll.IT Al(Y LPLCIVIL ATION FiUCLEMt PROPul.SION CONTitOL AF;D triLTI.UMl;;;TATION EQ Ull'M UNT. GE!..".I' A L 1. LGUll' EM sW T5

1. 6 I I Su nc e piibility. -

4.6.11.I The equipment shall be operated as 4. 6.11. 2 There shall be two noise source s as specifisd an the detailed test procedure s*with all in. afiown on f agure !!. Noise source No. I and the IU put and output caties run for e urtance of twer.ty equipment shall be er.ergi.ed f rom the same a.c.

Contact feet. ' S L r "- ' the noise sourc e output Source. The noi=6 sh ul be generated by operating

• * ' ' Th " ' ' ' * * " ' * * *

• b! ' ' h al l 'e 2 Parauel switch Si at the r.te of ten on.off cycles a minute Nith conductor,' unshielded cable. The output for a period of not less than two mi.nutes to deter.

cables oh.Il be of the same types as used for process mine that the equipment meets the requirements Control applic. tion. The method of terminating the SP'(tf ed in the individual equif. ment specification, c.t,le sh.Il be specified in the detailed test proce. This shall lie repeated.using noise source No. 2.

dure. .

NolSE SOURCE #: 1 . .

m L.g.3990gg;3g;p3)

.. Si g ECTIFIER / l ,

~

POAER l

115 VOLTS 410%, 60:ss

• 5'/o SUPPLY ll5 V2.TS dc

• 15*/o l l 1.1 l

I l-I I I I i l I l l NOISE SOURCE "2:

I I S

_..) g

/. t . e ll5 VOLTS 480%,60 cpse 5%

g,

. I I I NolSE SOUTE OUTPUG TBLE- 20 FEET TO BE g i ,~....-...';.........

I W T-' ' '. l0 : ;M : ^~

l gg in Contact I OUTPUT CABLES

. l (SEE 4.6.11) .

Sg - TWE 3SR, SINGLE PO'En 2 POSITION SWITCH.

L g - INDUCTANCE 3 HENRIES *l0%, AND RESISTA.NCE 500 OHkiS*10% ,

L 2- IPCUCTANCE 10 MILLlHENR:ES A 10 %, ANO R(SISTANCE 2 OHMS

• IO*/e Tigure 11 - Noise sources for susceptibility test.

!:'iteti to include output cables only Section C Aooendix G caae 2

o . .

TEST PROCEDURE 19900B1 TEST DESCRIPTI0ti:

f MIL-5~-199008 isolator output cablenoise source #1 antenna in contact wi

.1 All wiring is to be in the same position as described in the Pre-Test set-up. .

.2 i Place the liil Spec noise source #1.n contact wi$e t control wiring frcm 1FM-426(Antenna should be

/within Iq" offor at least 20 feet.)

.3 Continuously record the noise source [115 VDC]

Label Test 19900B1

.4 Activate the noise source on/off via switch S1 (approxirately 10 times /

minute for 2 minutes) and do all PT steps.

Labels become 1PT.1-1990081 etc. - .

416 3.244 426 3.247

( 436 3.246 i

DATE } 0 f ?. T 7 Y I r -

BY y

h

1. 1 g

i

'. , Section C

, Appen.fix G pat!c 3 1

TEST PROCEDURE 1990082 TEST DESCRIPTI0ti: MIL-fi-iS900G noisc source #2 antenna in contact with isolator output cable i

.1 All wiring is to be in the same position as described in the Pre-Test ,

set-up.

in contact with

.2 Place the Mil Spec noise scurce 52 the control wiring from IFM-42 6 (Antenna should be adjacent for at least 20 feet.)

.3 Continuously record the noise source (118 VAC)

Label Test 19900B2

.4 Activate the noise source en/off via switch 51 (approximately 10 times /

minute for 2 minutes) and do all PT steps.

Labels become IPT.1-1990082 etc. .

416 3.245 426 3.247 436 3.246 -

Treat:nts w.nt out after apnroximately 55 seconds for each. Since 3 steps of 55 s:conds cach were run, the total time exceeds 2 minutes; this was felt sufficient.

DATE / 0/[2.5 / 7Y BY -

/

G .

t Section a

'

• Apperslix G page 4

^- - - - ~

7.2-._r_....._.._.............

. ~.

. \

Test / 99ep A /

i O -

. S(MtARY g RESULTS Channel Bistable Trip Point ' Bistable Trip Point with Interference without Interference Present (Volts) -From Pre-Test (Volts)

Interference Continuously Applied :

s 416 426 436 -

Interference 3

. . Switched On & Off : .

r v 416 9.2.Vs/ 3. ;Wf 426 g, g,., 9 436 y, gg g,g S

v Section (:

v .

Test /99608z.-

~

SUMMARY

OF RESULTS Channel Bistable Trip Point ' Bistable Trip Point with Interference without Interference Present (Volts) -From Pre-Test (Volts)

Interferehte Continuously Applied :

416 426 436 -

Interference .

O Switched On & Off : .

A 416

3. 2.yf 3.2W 426 3, g 3.2.p7 436 a, g g,

( .

, e

v

• ~ ~ ' * %/- . ., , -o . ,, ,

t f

APPENDIX H L'

/ .

9 4

A

as O

TEST PROCEDURE 1A1 TEST DESCRIPTION: 118 VAC connected to isolator output wires (line to line)

.1 Disconnect output of 1FM-426(connections A & B) by unplugging output ,'

connector from 1FM-426 ,

.2 Ensure that field wires are properly disconnected and taped to prevent shorting per step 2PT.3.

.3 Remove 4-20 MA recorder connection from R1LTBE (8,10).

.4 ConnectrecordertoRISTBE(8,10)[118 VAC]-LabelTEST-1A1. channel 6

.5 Connect 118 VAC to R1LTBE.(8,10).

.6 Repeat Pre-test steps 1PT (all), 2PT (except 2PT.3), and 3PT (all).

Add - 1A1 to label for all recordings (i.e.1PT.1 becomes 1PT.1-1A1, etc.).

.7 Randomly switch Test Voltage on and off and '

repeat step 1A1.6 - Labels become IPT.1-1 AIR e,tc.

Add veriticatica verified at oc voltage at Isolator output C4 h R33 - OK

- OK

~

416 - 3.245 - 3.245 426 - 3.247 - 3.247 436 - 3.246 - 3.246 r/2.<//3 </

naTE

{ I  !

OY l J 4

, e

- o Section C

Test #4I b .

~

SUMARY OF,RESULTS Channel Bistable Trip Point Bistable Trip Point with Interference -

without Interference Present (Volts) -From Pre-Test (Volts)

Interference Continuously Applied :

416 g , gg g, 426

2. 2 #7 436 i 3, 2. p g, 3.' a.9y

Interference Randomly Switched On & Off : .

4iG 3,y ,,- 3.2vs--

I 426 g, y 3, 436 3,24 y,y g i

Section C

2 ___;_ -- - - -

+ .-

W i

+ ,

APPENDII: J p"-

V Section C

. TEST PROCEDURE 181-1 TEST DESCRIPTION: 250 VDC (onnected to isolator output wires (Line to Line)

. 1 Repeat steps 1A1.1 through 1A1.3. -

2 ConnectrecordertoR1hTBE(8,10)[250 VDC] - Label Test 1B1-1.

. 3 Connect 250 VDC to RikTBE (8,10).

(+8,-10)

. 4 Repeat 1A1.6.

Labels become 1PT.1-181-1 etc. -

. 5 Repeat 1A1.7.

Labels become 1PT.1-1B1-1R etc.

~

Varify at CD &

b R33 - OK -

(

416 - 3.246 - 3.246 426 - 3.248 - 3.248

436 - 3.247 - 3.247 (,

DATE / e!1- ! 7/

.- BY - ..

O Section C

/WGt@RJLFrYTLB

i Test / A /- /

b .

SUMMARY

O_F,RESULTS Channel Bistable Trip Point Bistable Trip Point with Interference without Interference Present(Volts) -From Pre-Test (Volts)

Interference "antinuously Applied :

416 3. u/4, 3, z.W' 426 g 3,1.jp 436 3, g,ip7

Interference Randomly f , ,. , ,

Switched On & Off :

416 3.244, 3 . 2.6 426 g,zyg 3,2,g7 436 g, 2.y7 3. 2.y 7 i

v . _ . -. _ , e, 1

t APPENDIX X f) i (

l 1

(', ,

e Section C Anoendix g s

~ ~"

T . .. . - - :.: . . _ . - .. . . .-. - . .

~

1

. l l

TEST PROCEDURE 2A, TEST DESCRIPTION: Current flow of 1 AMP in the isolator output wires

.1 Repeat steps lA1.1 through 1A1.3. -

.2 Connect recorder to RlM BE (8,10) [1 AMP].

Label Test-2A.

.3 Connect 118 VAC and approximately 100.st resistor to terminals RT6TBE (8,10) and insure that approximately 1 AMP is present. (Wires removed from 1FM-424 terminals are to be).connected together by using dummy plug which has A-B jumpered

.4 Repeat steps lA1.6.

~

Labels become IPT.1-2A etc. .

~~

.5 Repeat step 1A.7 Labels become 1PT.1-2AR

( )

416 - 3.245 - 3.245 426 - 3.247 - 3.247 436 - 3.246 - 3.246 o

BY

/

.. ff

=

v t '

O b M

Test 2A D '

SUMMARY

g RESULTS Channel Bistable Trip Point Bistable Trip Point with Interference -

without Interference Present (Volts) -From Pre-Test (Volts)

Interference Continuously Applied :

416 3,3pg 426 g_ g, 3.LY6 3.'Lyy ,

I

Interference Randomly y

Switched On & Off :

'\

06 g,zvf 3,:utr 426 ,

y 3, g 436

3. zv' 3.ty7 1

l 1

o V

( Section C

/YJailix B FDO S

m - - n-

--e.e .. n - , .. .

l l

l i

~

, APPENDIX L E

~

Section C Appendix L

g . . .u . ... _ _ . .  ;. z z _.. . ,- .x . . . . _ .

~

O, TEST PROCEDURE DCR1 l -

TEST DESCRIPTION: DC RmAY IN ISOL TOR OUTPUr VIRES '

.1 Repeat steps 1A1.1 through 1A1.3.

.2 Conne'ct recorder to Rl-TBE (8,10) (120 VDC)

Label Test ' DCR1 . _ _

.3 Connect 120VDC and DC relay to terminals R1-TBE k8,10)

(Wires removed from terminals 1FM-424 are to be) connected together by using dummy plug which has A-B jumpered

.4 Repeat steps 1A1,7 Labels become 1PT.l- DCRI etc ,

Verified at CB tt R33

- OK

,R

\

416 - 3.244 426 - 3.246 436 - 3.246 1

DATE I c } }. s 7c/

BY .- =

f .

Section C l * (vgiandix L page 1

r, -

v . . .-

/

Test bC2)

A

~

SUMMARY

OF RESULTS Channel Bistable Trip Point ' Bistable Trip Point with Interference without Interference Present (Volts) -From Pre-Test (Volts)

Interference Continuously Applied :

416 426

~

436 -

~

Interference Randomly Switched On & Off :

'\ ,/

C 416 3, 2.<// 1 LVa' 426 .

3. 2.vt, 3.w7 l 436

3. 2.sq. 3. 2.V7 l

l

~

e' I

l -

Section. .C. ,

.....as,

~

~. . .

~~~

I 1

m i

APPENDIX N

\_;

t l

t I

b Section C '

[

Appendix M

. - .n .

( ,

[

l APPENDIX M ,

The following papers and or reports were referred to but are not included because of the volume:

1. Reducing Electrical Noise to Instrument Circuits by Bruce E. Klipec, Member IEEE; Vol. IGA-3, No. 2 Mar./Apr.1967.

2. Dekotron Wire and Cable Selection Guide for Process Instrumentation.

3. Current Practices to Combat Analog Noise in Computer Installations; IEEE Paper #31PP66-497.

4. Shielding and Grounding for Instrumentation Systems - Dynamics Instrumentation Company.

, 5. Ground Circuits by R. W. Bunterback - Lawrence Radiation Laboratory-University of California Instrument and Control Systems; November 1969.

6. Analog Scanner Input Signal Practices; Project Bulletin #13.

7. Noise in Cable Systems; Trompeter Electronics, Inc.

8. Reducing Electrical Interference by Edward S. Ida, E. I. Du Pont de Nemous & Company.

/

YZ V

, Freic5 A

rr

. i

. i

/

((

TEST PROCEDURE 1Al-1 TEST DESCRIPTION: 460 VAC Connected to isolator output wires (Line to Line) .

0l l

1.1 All wiring is to be in the same position as described in steps 1A1.1 '

thr,ough 1A1.3. ,

1.2 Connect recorder to R1TBE (8,10) [460 VAC] - Label Test - 1Al-1.

1.3 Connect 460 VAC to Rl'-7BE (8,10).

1.4 Repeat step 1A1.6. '

Labels become 1PT.1 - 1Al-1 etc.

1.5 Repeat step 1A1.7.

. Labels.. become,1PT.1- 1 Al- 1..R .etc.__

k- .

Verify at CB & R33 OK Ramp 9 1 V/M Start 0 4 416 - 3.244 - 3.245 426 - 3.247 - 3.247 436 - 3.246 - 3.247 DATE iob c/ f n,/

. 1 i' BY [ /

/

b- .

Section C

p ..=.-_____c, ._.._._m-- -

r - -- am j -

- TEST PROCEDURE 1A2-1 .

TEST D' SCRIPTI0ft: 460VACconnectedtoisolatoroutputwires(line(+)to ground (shield)) ,

\

1.1 All wiring is to be in the same position as described in steps lA1.1 ,

through 1Al.3.

1.2 Connect recorder to RitTBE (8,11) [460 VAQ] - Label Test-1A2-1.

1.3 Connect 460 VAC to R1ETBE (8,11).

CAUTI0ti: Ensure that grounded side of 460 VAC is connected to terminal ID 1.4 Repeat steps lA1.6.

Labels become 1PT.1-1A2-1. .

1.5 Repeat step 1A1.7. .

Labels become IPT.1-1A2-1R. ,

k - ---

CK  : -

Verify at CB & R33 -

436 - 3.246 - 3.246 ,

426 - 3.247 - 3.247 416 - 3.245 - 3.245 e

e DATE lb# D V ~ 9V

' BY O h ?f3 !

V t

Sectio C -

. ~ . . . . . . . . _ . _. _ . . . .

l

.A ,

TEST PROCEDURE 1A3-1

,\

TEST DESCRIPTION: 460 VAC connected to isolator output wires (line,(-) to ground (shield))

I -

1.1 All wiring is to be in the same position 'as described in steps lA2-1.1 -

1.2 Connect recorder to RlW BE (10,11) [460 VAC] - Label Test-1A3-1.

1.3 Connect 460 VAC to R1h BE (10,11).

. CAUTION: Ensure that grounded side of 460 VAC is connected to terminal ll i 1.4 Repeat steps lAl.6. '

Labels become iPT.1-1A3-1.

1.5 Repeat steps 1A1.7. '

- .' Labels become IPT.1-1A3-lR.

~

[.

k. 2 i

Verify at CB & R33 og 416 - 3.245 - 3.245 426 - 3.248 - 3.248 436 - 3.246 - 3.246 "M h .e, ,

e

, O9 4 g a

DATE k - D 7 -7(/ /

r gy hg ~, y,) f](Jf, ,

b

, - S -