ML20215F444

Forwards Summary of Test on Isolation Device & Results Verifying That Test Fault Did Not Affect Input Circuit,Per Request.Isolation Device Continued to Perform Function

ML20215F444
Person / Time
Site:	Davis Besse
Issue date:	10/06/1986
From:	Williams J TOLEDO EDISON CO.
To:	Stolz J Office of Nuclear Reactor Regulation
References
1209, 1309, TAC-57033, NUDOCS 8610160207
Download: ML20215F444 (6)

Text

--

4 TOLEDO

%mm EDISON JOE VVILUAMs. JR.

s- vapn - w (419)243 2300 I4'W ** 5"*3 Docket No. 50-346 License No. NPF-3 Serin 1 No. 1309 October 6, 1986 Mr. John F. Stolz, Director PWR Project Directorate No. 6 Division of PWR Licensing - B United States Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Stolz:

On July 26, 1984 (Log No. 1561) the NRC Staff requested additional infor-mation regarding isolation devices between the Safety Parameter Display System (SPDS) and the safety systems for the Davis-Besse Nuclear Power Station Unit No. 1. This information was requested to confirm that the SPDS could be isolated from electrical and electronic interference with equipment and sensors used in safety systems. On September 25, 1984 (Serial No. 1086), Toledo Edison provided the additional information. The NRC Staff then verbally requested test information for the SPDS isolation ,

devices. This information was provided in our letter dated March 12, 1986 (Serial No. 1238) for Fischer & Porter and Bailey 880 System isolation devices.

After reviewing the test data the NRC Staff had additional questions con-cerning the Fischer & Porter isolation device. Toledo Edison agreed to perform a test on an isolation device and submit the results to the NRC for their review. Attached is a summary of the test and results which verify that the test fault did not affect the input circuit and the isolation device continued to perform its function.

Very truly yours,

!f / /, _ -

9/ I JW: GAB:JA {

Attachment hD g

cc: DB-1 Resident Inspector

! THE TOLEDO EDISON COMPANY EDISON PUOM 300 MADISON AVENUE TOLEDO, OH;O 43652 8610160207 861006 PDR ADOCK 05000346 1 P PDR

,, Dock t No. 50-346

' License No..NPF-3 Serial No. 1309

-Octcher 6, 1986 Attachment TEST RESULTS TITLE Fischer & Porter 50EK1000 Isolation Tests INTRODUCTION The Safety' Feature Actuation System (SFAS) employs electrical isolation devices (I/I Converter) from Fischer & Porter in the 4 to 20-mA analog input circuits monitoring the following plant process variables:

1. Containment Radiation

2. Reactor Coolant Pressure

3. Containment Pressure

4. Borated Water Storage Tank Level i The I/I converters:are used to protect the safety related SEAS equipment, including. sensors, from potential interference with connected non-1E indicators and other components of the Station Computer and of the Safety Parameter Display System (SPDS) outside the SFAS cabinets.

The I/I converters, supplied with the SFAS equipment, were qualified by the supplier as documented in Reference /5/.

.The NRC requested by letter (Reference /1/) additional information regard-ing the isolation devices. Subsequent to the information provided by TED letters /2/ and-/3/, the NRC Staff has verbally' requested TED to test the Fischer & Porter I/I converter by applying line voltage of 120 VAC across the output of the device and monitoring the input circuit parameter to ensure the fault will not reflect into the input circuitry of the safety system.

REFERENCES

/1/ NRC letter, Log No'. 1561, dated July 26, 1986

/2/ TED letter to NRC, Serial No. 1086, dated September 25, 1984

/3/ TED letter to NRC, Serial No. 1238, dated March 12, 1986

/4/ Fischer & Porter letter to Bechtel Corp.' Attachment I to Serial 1238, dated February 20, 1985

/5/ Consolidated Controls Report (ER7054)

/6/ "I/I Converter In Circuit Fault Isolation Test" Procedure (5 pages)

. modified, dated August 21, 1986

/7/ Test Results: -Data Sheet: 50EK1000 Converter

s\-

Dock t No. 50-346 2

License No. NPF Serial'No. 1309 October-6,~1986

' Attachment TEST PERSONNEL TED: J. R. Albert (System Engineering, I&C)

CCC: George Garrity (Consolidated Ccarrols Corporation)

Al Emanuele (Consolidated Controls Corporation)

Rene'Poirier (Consolidated Controls Corporation)

EQUIPMENT USED

• Foxboro NE11GH Transmitter - Serial #4669799

• ' 'DMN-FLUKE Model 77 Cal No. 677 (CCC) Cal Due 9/30/86 Used on 4 to + terminals of I/I

• DNM-FLUKE Model 77 Cal No. 676B (CCC) Cal Due 9/30/86 Used on Vo to com terminals on Analog Amp.

• DNM-FLUKE Model 75 Cal No. 766 (CCC) Cal Due 3/87 Used on 4 to + terminals to monitor fault current

• DMN-FLUKE Model 8500A Cal No. 314B (CCC) Cal Due 9/86 Used on Vi to com Terminals on Analog Amp.

• OSCILLOSCOPE - Model 434 Cal No. 396 (CCC) Cal Due 9/86 ,

Tektronix Used on Vi to com Terminals on Analog Amp.

• Regulated Power Supply Lambda LPD-423A-FM CCC ID 725 '

Used for system power

'

• Regulated Power Supply Lambda LPD-423A-FM CCC ID 719 Used for currect loop

• 6N81 Bistable Serial No. 010

• 6N86 Analog Amplifier Serial No. 023

• Fischer & Porter I/I Converter 50EK1000 (CCC P/N KD978)

Serial Number 8310A0370AS

• Brush Recorder Model 220 - Cal No. 267 (CCC) Cal Due 8/86 CH1-4'to + on I/I converter CH2-Vo to Com on Analog Amp.

• UPC 5200 Pressure Calibrator - CCC, Ser. No. A000

• VARIAC

. . _ _ _ _ _ _ . . . _ . . , . _ _ _.__ _ . _ _ _ _ . _ _ . . _ _ _ . _ _ _ _ . _ _ _ . _ , - _ _ _~

- Dock:t Ns. 50-346 License No. NPF-3 Serial No. 1309

. 0ctober 6, 1986 Attachment TESTS The test was performed on August 21, 1986 at Consolidated Controls Corpo-ration (CCC), Danbury, Connecticut with TED representative as observer present.

The test setup reflected a typical SFAS analog input channel. As the sensor, a Foxboro N-E11GM pressure transmitter with 0-2500 psig range was used. The pressure transmitter was connected to a test pump to simulate system pressure. The input channel was terminated by a SFAS bistable, set for decreasing signal to trip. A wiring schematic of the test setup is shown in Figure 1.

The test was performed and data recorded using the test procedures in references /6/. Briefly the testing was conducted as follows.

Using the VARIAC in the non-1E output circuit a faulted voltage of 120 VAC was applied to the output of the I/I converter. Test pump pressure was

- decreased to the bistable setpoint in order to trip the SFAS channel.

Voltages at the Analog Amplifier input and at the SFAS bistable were measured at the bistable setpoint trip before applying the fault voltage, with the fault voltage applied, and after removing the fault voltage. The channel circuit was tripped three times during each condition of the test (before, during, and af ter application of the fault voltage) to ensure repeatability and to evaluate setpoint deviation.

TEST RESULTS Voltages at the input to the Analog Amplifier and the SFAS bistable at the bistable setpoint trip are shown in Table 1 for each condition of the test. The data indicates no significant effect of the fault voltage applied to the output of the I/I converter. The duration of the fault voltage applied across the output of the I/I converter was approximately 10 minutes. As documented by the test data, the fault did not affect the input circuit at all. The I/I converter continued to function.

CONCLUSION It is the determination of TED engineering that the Fischer & Porter 50EK1000 I/I converter is suitable for use in the SEAS as an isolation device.

J

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Dockat No. 50-346

   'Licensa No. NPF-3 Serial No. 1309 October 6, 1986 Attachment Data Sheet :    50 EK1000 Converter Procedure Steps:    6.1 - 6.8 I. Condition: No fault applied Measurement      Input Voltage  Biatable Voltage Number-         (V1 - Com)       (ATI - Coa)

• 1 3.5*8 3.43 I Gco ps.g 2 3.59 3.YY l(64.@s) 3 '

Allowable Average 3.573 3.437 I(a) 1(a) + I(b) = (1) 3. 4 4 7 Max. Deviation o.o1 0 ol I(b) I(a) - I(b) = (2) 3. 4 2.7 (Highest-Lowest) I(a) - 37.5 mv = (3) 3.4co II. Condition: With default applied 1 J.59 3.44 I"5 PS II(a) i between (1) and (2) 2 8. I9 3 ll 4 VerifiedVh date %fztl%(.

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ILt.s fg . , Average d[7 d. Y Y II(a) Verified h date Tf 21,,% U Max. Deviation 0 00 6. DO II(b) (Highest-Lowest) III. Condition: No fault applied, af ter fault voltage removed 1 3.59 3. Md III(a) is between (1) and (2)  ; i 2 3, f7 3. Y Y Verified _\n date Ts 2. ( % 3 3.59 3.NY e ied date %f2.1 fE Average 3.59 8 YY III(a) Max. Deviation O.oO o ,CO III(b) i s.}}