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Procedures & Calculations Re Pump Monitor Isolation Subsystem,Vitro Seismic & High Voltage Tests & Pump Monitor Response Time.Submitted in Support of Tech Spec Change Request 27
	ML20148L207
Person / Time
Site:	Crystal River
Issue date:	12/05/1980
From:	; BABCOCK & WILCOX CO.
To:	;
Shared Package
ML20148L204	List: ML20148L200; ML20148L207;
References
	PROC-801205, NUDOCS 8012090225
	Download: ML20148L207 (150)
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FUNCTIONAL TEST PROCEDURE l-FOR PUMP MONITOR ISOLATION SUBSYSTEM r

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&f rosdW ?>lY b 1.0 PURPOSE The purpose of this document is to provide a basic procedure for guidance in the performance of a test to verify that the pump monitor electrical isolator is compatible with the cump contact monitor in the NI/RPS.

2.0 SCOPE The scope of this document is to provide a procedure and acceptance criteria sufficient to allow others to setup and conduct the test on a contact monitor.

3.0:

BACKGROUND Presently reactor coolant pump performance is monitored by power monitor devices.

Relays are de-energized on detection of pump ma1 performance.

Con-tacts associated with the relays are utilized to signal, by opening contacts, pump outage to the NI/RPS.

The relay insult. tion contact to coil, is relied on to provide electrical isolation between trie NI/RPS and pump controller.

In the present licensing climate, the relay isolation quality is being ques;ioned.

The present scheme is to provide photoelectric isolation between the relay contacts and the circuits leading to the NI/RPS.

The isolation quality of the isolator is the subject of a different test program.

This program is to demonstrate the suitability of the iso 1'ator to interface with the NI/RPS.

Relay contacts present essentially zero ohms resistance to the NI/RPS circuits when the relay is energized and infinity when the relay is de-energized.

This contrasts with, respectively, 400 ohms or less and 500,000 ohms or greater for the photoelectric isolator.

The aim of the test program is to demonstrate that the contact monitor interprets 400 ohms and 500,000 ohms in the same way that it interprets zero and infinity.

Mathematical analysis predicts a successful test.

The purpose of the test is, then, to confirm the analysis.

THIS DOCUMENT CONTAINS 4.0 TEST EQUIPMENT REQUIREMENTS POOR QUAllTY PAGES The test equipment required for the test prc y S:

4.1 A 0-23Kchm potentiometer and a 0-300,000 potentiometer.

4.2 Multimeter capable of measuring resistance in the range of 10 ohms to 10 megohms.

4.3 Availability of the NI/RPS to serve as a test bed - reference prcrequi ito conditions Section 5.

4.4 Hookup wire, etc. as required to make the test hookups.

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5. 0 PREREQUISITE CONDITIONS l

One RC pump monitor input of one channel of the NI/RPS will be utilized as a test bed for some phases of the test program.

For this reason, the plant must, for these phases, be in a shutdown condition and in a posture where operational status of the NI/RPS is unimportant to plant safety.

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6.0 ST PROGRAM 6.1 Preparation These steps prepare for the evaluation phase:

A.

Thru proper procedures - energize NI/RPS Channel A if not already energized.

B.

Locate.the RC pump monitor located in NI/RPS Channel A C.

Check to confirm that Loop A and Loop B contact status lamps on the contact monitor are bright indicating that all four RC pumps are off.

D.

Locate row 10 block 5 terminals 1 and 2 in NI/RPS cabinet A1.

E.

Using up to date plant drawings verify that these terminals -

reference D above - are the pump menitor contact connections for Loop A RC pump 1.

Further verify that these terminals are correct by momentarily jumping these terminals with a test lead while noting that the loop A lamp on the contact monitor is dim when the jumper is in place and bright when the jumber is removed.

F.

Remove power to NI/RPS channel A.

G.

Make the circuit arrangement illustrated in Figure 1.

H.

Power up NI/RPS channel A thru proper procedures.

6.2 Procedure Utilize the following procedure to execute the test:

A.

Adjust the potentiometer (0-20,000 ohm) value as indicated in' step one column one of table 1.

B.

With S1 open - record the state of the lamp as required by column 3 of the table.

C.

With S1 closed - record the state of the lamp as required by column 4 of the table.

D.

Repeat steps A,B, cml C above for each remaining step in colunn 1 of the table.

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Record the results.

F.

After completion of the test, remove channel A power and disconnect the test. setup.

Procedure 2 Utilize the following procedure to execute the test:

A.

Adjust the potentiometer (50K to 1000K chm) value as indicated in step 1 column 1 of table 2.

B.

With S1 open - record the state of the lamp as required by column 3 of the table.

C.

With S1 closed - record the state of the lamp as required by column 4 of the table.

D.

Repeat 'teps A, B, and C above for_each. remaining step in column 1 of the table.

E.

Record the results.

F.

After completion of the test, remove channel A power and disconr ect the test setup.

Return NI/RPS to its former state through propt r procedures.

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To calculate the response' time of the Florida Pump Monitor Watts Transducer and Detection Circuit i

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L B & W DOCUMENT NUMBER 50 1020eg3

() 0_

e DIGITAL ISOLATOR ASSEMBLi SEISMIC QUALIFICATION TEST PLAN No. 3406 4 p# WM%$"'3.%

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h June 23, 1980

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Prepared by:

Approved by:

b V. Loczi J. C. Schuessler

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Q AUTOMATION INDtJSTR!ES. INC.

fl VITRO LACOR.*JORIES OlVISION Lan !.t')es e net

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T3 AUTOMATI'ON INDUSTRIES.INC.

VITRO LABORATORIES DIVISION

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DIGITAL ISOLATOR ASSEMBLY SEISMIC QUALIFICATICM TEST PLAN 1.0 SCOPE 1.1 This test plan descripes a program which will verify that the Digital IsolatorAssemblyforFloridaPowerCorporation7,000-voltIso1} tion System can withstand, without loss of safety function, the effects of seismic occurrences which cause a floor response as depicted in Speci-fication No. 08-1119707-00, Appendix 3.

2.0 APPLICABLE DOCUMDITS 2.1 Babcock and Wilcox Equipment Specification No. 08-1119707-00.

2.2 IEEE 344-1975, "IEEE Recommended Practices for Seismic Qualification of Class 1E Equipment for Nuclear Power Generation Stations".

3.0 EQUIP.'1EN'T FOR SEISMIC TEST 3.1 The Digital Isolator Assembly 7,000-volt Isolation System consists of a digital isolator, wiring, and associated terminal boards.

The digital isolator is a photo-opto device approximately 2 inches in diameter, 4-1/2 inches long, and weighs approximately 112 grams.

The Digital Isolator counts in a 0.89-inch diameter hole in a.125-inch-thick vertical panel.

Four Digital Isolators will be seismically tested. The wiring consists of 36-inch-long, minimum, AWG No. 22 input wires and 1813-inch AWG No. 22 output wires to the terminal

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AUTOMATION INDUSTRIES.INC.

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VITRO LABORATORIES DIVISION 4

boards. The G.E. CR151B4 terminal board is approximately 2-3/8 inches lon3 and mounts with two No. 8 screws on 1-1/8-inch centers.

The Digital Isolator Assembly is defined by Automation Industries, Inc. Drawing 3406-1000.

4.0 SEISMIC QUALIFICATION 4.1-The Digital Isolator Assembly will be qualified by tests in accor-dance with IEEE 344-1975. Seismic tests will be random-motion, multiple-frequency, 45 biaxial, phase-dependent tests with simul-taneous horizontal and vertical inputs. The Test Response Spectra from the control accelerometer will envelop the Required Response 4

Spectra at the required damping value. During qualification testing, the acceleration levels will be monitored.

The Digital Isolator Assembly will be operational and electrically monitored to verify there,is,no degradation due to the seismic occurrence.

5.0 SEISMIC TEST 3 5.1 The Digital Isolator Assembly will be attached to a.125-inch-thick vertical panel on a test fixture on the test table as shown in Figure 3.

Af ter the assembly is in place, a control accelero=eter will be attached to the test fixture adjacent to the Digital Isolator Assembly in accordance with Figure 1.

The tested arrangement duplicates the actual plant installation.

4 4

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(C)

AUTOMATION INDUSTRIES. INC.

VITRO LABORATORIES OlVISION 5.2 O.B.E. Proof Test-Five_O.B.E. proof tests will be conducted on the Digital Isolator Assembly in each of four directions due to the 45 biaxial testing.

The Digital Isolator Assembly will be subjected to simultaneous hori-sontal' and vertical input accelerations of random-motion consisting of frequencies spaced one-third octave apart over the frequency range 3

of 1.0 Hz to 33 Hz for a period of 30 seconds. Within the first two seconds, the digital isolators will be turned "0N".

The "0N" signal resiscance will be measured within the first 15 seconds on all four '2 nits being tested.

The digital isolators will then be turned "0FF" cud the "0FF" signal resistance will be measured on all four units within the balance of the 30-second test.

The amplitude of each one-third octave frequency vill be independently adjusted to an iterative process in each axis until the TRS from the control accelero, meters envelops the RRS at a damping of 5% by a spectrum a nalyz er., The RRS is defined by Figure 2.

Following the test, in each direction, the Digital Isolator Assembly will be examined for

' damage and hardware will be retightened if necessary.

5.3 S.S.E. Proof Test One S.S.E. proof test will be conducted on the Digital Isolator Assembly in each of four directions due to the 45 biaxial testing.

The Digital Isolator Assembly will be subjected to simultaneous horizontal and vertical input accelerations of random-motion consist-ing of frequencies spaced one-third octave apart over the frequency 4

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AUTOMATION INDUSTRIES.INC.

VITRO LABORATORIES DIVISION range of 1.0 Hz to 33 Hz for a period of 30 seconds. Within the first two secondi, the digital isolators will be turned "0N".

The "0N" signal resistance will be measured within the first 15 seconds on all'four units being tested. The digital isolators will then be turned "0FF" and the "0FF" signal resistance will be measured on all four units within the balance of the 30-second test.

The amplitude of each one-third octave frequency will be independently adjusted to an iterative process in each axis utttil the TRS from the control accelerometers envelops the RRS at a damping of 5% by a speecrum 1

analyzer. The RRS is defined by Figure 2.

Followinh; the test, in each direction, the Digital Isolator Assenbly will be examined for damage and hardware will be retightened if necessary.

5.4 The sequence of 0.B.E. and S.S.E. proof tests is not critical,, pro-vided each S.S.E. test is preceded by the corresponding five 0.3.E.

tests in' each of the four directions.

5.5 Photographs will be taken of the test setup, accelerometer location, and any noticeable physical damage.

3.6 Following the test, the Digital Isolator Assemblies will be packaged and shipped to Vitro Laboratories.

6.0 ACCEPTANCE CRITERIA 6.1 The criteria for acceptance or failure will include the following:

(a) The direction of testing shall comply with Figure 1.

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AUTOMATION INDUSTRIES.lNC.

Ji VITRO LABORATORIES OlVISION (b) The Digital Isolator Assembly shall be tested to the seismic

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level of the acceleration response spectra of Figure 2 when analyzed at the required damping value.

(c) The Digital Isolator Assembly,shall demonstrate sufficient structural integrity with no structural failure, broken or loosened parts, so proper functioning is not compromised.

(d) The "0N" signal shall have a resistance value of 5,000 ohms, maximum, before, during, and af ter each 0.B.E. and S.S.E.

proof test.

(c) 'The "0FF" signal shall have a resistance value of 125,000 oh=s, minimum, before, during, and af ter each 0.3.E. and S.S.E. proof test.

7.0 DOCUMENT.4 TION 7.1 A report wil!. be prepared which documents the results'of the test program and provides verification that the Digital Isolator Assembly can withstand the specified seismic occurrences without loss of safety function.

The test report will be prepared in accordance with the outline presented in paragraph 8.4 of IEEE Standard 344-1975, and'will contain:

(a)

Equipment Identification (b)

Equipment Specification (c) Test Facility Identification 1.

5-e 4

69 AUTOMATION INDUSTRIES. lNC.

VITRO LABORATORIES DIVISION (d) Test Equipment and Calibration Due Dates (e) Test Methods and Procedures (f) Test Data (3) Results and Conclusions (h) Signature and date by a registered professional engineer.

(1) Approval signature and date by a knowledgeable offic.er of the company.

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I Digital Isolator Assembly 0+20 Fe -Lbs.

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APPROVED SIZE CODE IDENT NO w. d. 4. 4 2 7.e a Tc A 99789 Tv 3406 1000 SHEET l

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i 10 EQUIPMENT REQUIRED 1.1 -

AC Source

" Capable of supplying at least 1 ma at 1000 to 7000 volts AC, 60 Hz, 1.2 AC Source Capable of supplying at least 50 ma at 28 VAC, 60 Hz.

t

1. 3 DC Source Capable of supplying at least 2 ma at 12 volts DC.

1.4 AC Voltmetar (Instrument Used)

Capable of measuring 7000 VAC with no greater error than *10%.

1.5 AC Voltmeter (Instrument Used)

Capable of measuring 28 VAC with no greater error than *2%.

1.6 Clip On AC Ammeter (Instrumer.t Us ed)

Capable of measuring 1 ma AC, 60 Hz with r.o greater error than

5%.

1.7 Oscilloc cone (Instrument Used)

Vertical sensitivity of 2 volts / division *5%.

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Vertical input impedance of 10 megohms, Sweep rate of 20 milliseconds per division

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Capable of being triggered externally.

1.8

_Menohmm e t e r (Instrument Used)

Capable of measuring 10,000 megohms with no greater error than *20%

at a potential ~ of 500 volts DC.

StiC CODE IDENT NO.

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'1. 9 Ohmmeta r (Instrument Used)

Capable of measuring SK ohms to 10 megohms with no greater error than 45%

l 1.10 Environm' ental Chamber (Instrument Used)

Capable of operating at +110 F and indicating the chamber temperature with no greater error than *2 F.

1.11 Test Fixture shown in Figure 1.

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2.0.' TEST PROCEDURE 1

2.1 Dielectric Strencth and Insulation Resistane.e

- - WARNING ***

THIS TEST INVOLVES HAZARDOUS VOLTAGES EXERCISE EXTREME CAUTION i

2.1.1 Verify that the 7000 VAC source is off, then place the Digital Isolator

.j to be tested in the test setup shown in Figure 2.

Apply the voltage between the photodetector (with the photodetector leads shorted together) and the body of the Digital Isolator.

2.1.2 Turn on the 7000 VAC source, adjust for a 7000 VAC indication on the AC voltmeter and verify that no breakdown occurs. The duration of this test should be at least 60 seconds. Breakdown will cause audible arcing sounds or a current greater than 1 ma.

2.1.3 Apply 7000 VAC between the lamp lends and the photoresistor leads and verify that no breakdown occurs. Apply the 7000 VAC for at least '60 seconds.

.2.1. 4 Remove the Digital Isolator from the test setup and measure the Insu'lation resistance between the phctoresistor leads and the body of the Digital Isolator. The insulation resistance must be at least 10,000 megohms at 500 VDC.

2.1. 5 Apply 1000 VAC between the lamp leads and the body of the Digital Isolator and verify that no breakdown occurs. Apply the 1000 VAC for at least 60 seconds.

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test setup and measure the insulation resistince between the lamp d

o leads and the body of the Digital Isolator. The insulation resistance must be at least 10,000 megohms.

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Figure 2 - Hi-Pot Test Setup 2.2 On/Off Resistances 2.2.1 Using the ohmmeter (1.9), measure the off resistance of the photo-r e si s to r.

The resistance must be at least 10 megehms.

l 2;2.2 Using the AC source (1.2), apply 28 VAC to the Digital Isolator lamp.

Adjust the source for a 28.0 volt indication when monitored with the i

AC voltmeter (1. 5).

SIZE CODE 10ENT NO.

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2.2.3 Msasuro en racistance of the photoresiotor using the ohmmator (1. 9). If tha rosietnnco is grantar than 5000,chms, tha Digital Isolator must be rejected. If the resistance'is less than 4000 ohms, Steps 2.2.4 and 2.2. 5 may be skipped.

2.2.4 Place the Digital Isolator in the environmental chamber with 28 VAC 5

applied to the lamp and the ohmmeter connected to the photoresistor.

2.2.5 After at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at 110 F, measure the resistance of the photo-resistor. The resistance must be no greater than 15,000 ohms.

2. 3 On/Off Delav Time 2.3.1 Place the Digital Isolator in the test setup shown in Figure 3.

2.3.2 Adjust the oscilloscope trigger controls for a free running sweep.

2.3.3 Connect the oscilloscope (1.7) vertical input to ground and adjust the vertical position control to align 'h.c trace 3 divisions below the t

graticule center line.

2.3.4 Connect the vertical input to the 12 VDC source and adjust the source voltage to align the trace 3 divisions above the graticule center lf.ne.

2.3.5 ~ Connect the vertical input to the test fixture (1.11) oscilloscope vertical output and adjust the trigger controls to produce a sweep triggered only by changing the position of the on/off switch on the test fixture.

2.3.6 Determine the on delay time by switching the on/off switch from the off position to the on, position and measuring the time between the i

start of the track and the point at which the track crosses the graticule horizontal center line. (See Figure 4A. ) The switch 512C CCOC IDE.N T No.

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The on tima delay must not exceed 150 milliseconds.

i2,3.7 Datarmina the off time delay in a manner siinilar to the on time delay measur eme.nt. The off time delay is measured as the on/off switch is moved from the e position to the off position. The off time delay must not exceed 150 milliseconds.

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32 DOCUMENT IDENTIFIER TRANS. 86 TYPE:

.,_ arstuen a ocyn.ers.vr,_,_sArm uAt.vsts anou ___puc sur. ren _._ourcx acc. )Lastex v::.str.

___.on n TITLE Contact Monitor Signal PREPARED BY H.L. Dye p/. M, REVIEWED BY TITLE Principal Engineer DATE 7/22/80 TITLE [ h '<. d W DATE 7.JS SC PURPOSE:

To detennine the maximum and minimum signal resistor value that will signal a BCC0 Contact Monitor Model No. 880 (PT. No. 6621895A1H.A1,A2,A3) on and off.

SUMMARY

OF RESULTS (INCLUDE DOC. ID'S OF PREVIOUS TRANSMITTALS & SOURCE CALCULATIONAL PACKAGES FOR THIS TRANSMITTAL)

The maximum on reslstance for BCC0 Contact Monitor has to be less than 24.9K ohms.

The minimum off resistance for a BCC0 contact monitor has to be greater than 113.8K ohms.

j DISTRIBUTION H.L. Dye S.L. Eschbach File NSS-7/T2.1.1 N.R. Stephens B.J. Shepherd Page I

of I

Calculations to determine the maximum on and minimum off resistance to activate a BCCO Contact Monitor Model No 880 (PT. No. 6621895A1H,A1,A2.A3).

1.

Contact Monitor Description This information is taken from BCCO Product Instruction Sheet Number E92-343.

The input to the Contact Monitor consists of a voltage signal which is applied to a voltage divider network.

The voltage divider network consists of a 56.2K chm

. resistor and a 3.9K ohm resistor.

The output of the divider network signals the open loop comparator. Refer to Figure 1 for additional circuit details.

The reference voltage at the non-inverting input uses the output as a variable bias signtl. The variable gain adjustment provides hysteresis in the switching point as shown in Figure 2.

When the output of the comparator is saturated at a maximum positive, the voltage referred by a contact or resistor must reach a

-45 volts to_ exceed the switching point.

When the output is saturated at maximum negative, the voltage referred by signal contact or resistor must reach approx-imately -85 volts to exceed the switching setpoint.

2.

Power supply retulation is fl%.

Refer to BCC0 Report No. 2362, B&W No. 58-0133-00.

3.

The voltage divider network resistors are:

3 A.

56.2K ohms'11% (Per the Bailey Report No. 2393 - B&W No. 58-0131-00) 6.

3.9K ohms *6%.

4.

Per BCCO Report No. 2393, the voltage range for the high setpoint is-85.4 VDC to-87.2 VDC and the voltage range for the low setpoint is-44 VDC to-45.8 VDC.

5.

The voltage applied to the Contact Monitor is varied by the on and off resistance of the Isolator.

87.2 volts will be used to determine the maximum on resistance and 44 volts will be used to determine the minimum off resistance.

6.

The equation used to determine the on and off signal resistance of the Isolator is shown on Figure 3.

7.

The maximum on resistance required to maintain the Contact Monitor in an ener-gized state has to be less than the value of R(on) as shown below:

R(on)=

(125V. -1%) - 87.2 x

(56.2K - 1%) + (3.9K - 5%)

87.2 R(on)=

123.75 - 87.2 x

55.638K + 3.705K 87.2

= 3_6. 55 x_59.343K 87.2 R(on,)_=24.87Kohms F/oRid,9.D.wu.Crrr.

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.-..: Con McLMeri/MJ49sW

~Ns1-7/79.I./

~

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N

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923- @..

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c 7.

The minimum off resistance required to maintain the Contact Monitor in a de-er.ergized state has to be greater than the value of R as shown below:

aff R(,ff)=

(125 + 1%) - 44 x

(56.2K + 1%) + (3.9K + 5%)

l 44 (126.25 - 44) x (56.762K + 4.095K)

=

44 ll3.76K ohms

=

k Eloa i dd. Lo wer_.cory-gu.- 7 _

...... C on M c-LMon.fsp S).gsn/

.pss-7/re.1,1

~~

N 0.e 7-ee ao c,cD 4' 79AD g

1 6 -

- -.=+=.-.

_ _.....I

P05 78037'.

'GillERAL CALCULATIONS 1

i

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c aftfe.

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5

, e V'4" it L

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R9.8 VAR /ABLE

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.S/ Gr WAL Ar %

s y

- Input Signal Conditioner Network yta vas.s z

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Netwo.k Ilysterests Carve FIGURE 2 i

Customta f:/fy p p p g /b gpp

Cgypp, peoP NO CONT NO Ngf.7 suntCs g w,s,, _.,e g,g;.ppy 3, n g, owo.No ris t Ho p39 7/ T P.f.I Comt. NO CROUP NQ cate. er,y,f.y o4:e 7-2 2./dt:Hzoe @ oatsp S Y sheet No. 3 e

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9 FIGURE 3 1.

The voltage signal for the Contact Monitor is shown below:

V =.125 t 1%

Isolator (Note 2)

V:

R (R(on) or Rtgff))

'- +

N Input Voltage Signal to Contact Monitor i

56 2X Ve

?RT (56.2K

1% + 3.9K t 5%)

=

3 9.K Note 1 A

6 2.

Since I

= V, then V

=V

=

2 3

2 R

R R

R T

T Let Vj V*V

=

2 3.

Thus: R

= V)RT (Y~Y)R 2

T Y

Y 2

2 Note 1) RT is the Contact Monitor voltage divider.

2) The Isolator is a variable resistor with an "on" state value of

)

about 3K ohms and an "off" state value greater than 1H ohms.

-- :-.- E/orids Po' y er Coxp

'='

W ss.7

~.... CON /dCL.MONIt'OR SQNA/-.

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' [hh Yzt W

[b [

]

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ML20148L207

Text

SUMMARY

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