ML20101K282

Draft Interim Justification Position for Seismic & Environ Qualification of In-Core Thermocouples,Connectors,Adaptors & Ref Junction Box (ESE-43 & ESE-44)

ML20101K282
Person / Time
Site:	Wolf Creek, Callaway, 05000000
Issue date:	12/21/1984
From:	WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:
Shared Package
ML19274C574	List: ML20101K260 ML20101K282 NRC-84-0135, Forwards Proprietary & Nonproprietary Revised Draft Interim Justification Position for Seismic & Environ Qualification of In-Core ... & Westinghouse Authorization Ltr & Affidavit.Proprietary Version Withheld (Ref 10CFR2.790)
References
NUDOCS 8412310282
Download: ML20101K282 (32)

Text

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WESTINGHOUSE CLASS 3 i

SNUPPS Interim Justification Position for the Seismic and Environmental Qualification of the Incore Thermocouples, Connectors, Adaptors 6

and Reference Junction Box

! (ESE-43 and ESE-44) 4 I

l 8412310282 841221

PDR ADOCK 05000482 h PDR

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WESTINGHOUSE CLASS 3 The Class LE thermocouples, connectors, adaptors, and the re f e rence

' junction box located inside containment form part of a core exit temperature monitoring system to be qualified for use during and af ter a design basis LOCA, MSLB or seismic event. In addition to the accident environment to which components inside containment might be subjected, the thermocouple junctions in the reactor vessel are to be qualified for operation in the event that a LOCA might lead to inadequate core cooling (ICC). The DBE conditions to which the components are to be qualified, therefore, include a 384.90F peak temperature MSLB simulation (the Westinghouse generic profile up to 4200F provides adequate margin for SNUPPS applications) with caustic spray and, for the thermocouple measuring junctions, a 22000F peak temperature inadequately cooled core simulation (which provides adequate margin over the SNUPPS required peak clad temperature).

The WRD qualification program is presently incomplete. Test sequence steps of accelerated thermal aging, normal radiation and seismic simulation have been completed on the connectors and adaptors but a retest is currently scheduled. The re f e re nce junction box has been aged, irradiated, and seismically tested as discussed below. The thermocouple test sequence has been completed. The status of completed testing and the justification for intetim operation of the system are provided below.

Thermocouples i

The thermocouples, including the measuring junctions and portions of stainless steel sheathed cable located inside the vessel, have been subjected to seismic and LOCA conditions and demonstrated successful performance during and after the dynamic simulations. Accelerated thermal aging was not required because there are no organic materials in the thermocouple and effects of high (normal) irradiation on the mechanical properties were evaluated and decermined to not af fect satisfactory performance of the sheath.

The seismic simulation test was conducted by shaker table using controlled multi-frequency test inputs. The thermocouples were sub-jected to five Operating Basis Earthquakes (OBE) and four Safe Shutdown Earthquakes (SSE).

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WESTINGHOUSE CLASS 3 s

The LOCA vibration simulation test was conducted by shaker table using random multi-frequency test inputs. The thermocouples were subjected to five seconds of random inputs at levels described by the power spectral density (PSD) plot.

Examples of the test response spectra (TRS) shown in Figures 1, 2, and 3 demonstrate adequate envelopment of the appropriate RRS for the OBE, SSE, and PSD test levels, respectively. The OBE RRS is two-thirds of the SSE RRS.

TLroughout the test sequence no structural damage was observed and the thermocouples functioned properly.

The thermocouples have also been subjected to a 22000F peak tempera-ture inadequately cooled core simulation and demonstrated successful performance both during and after the tests.

Connectors The thermocouple connector assemblies have been subjected to accelerated thermal aging and irradiation (gamma and beta) and seismic simulation.

The test program is being repeated because tne radiation test dose was not adequate to simulate the requ red Westinghouse generic post accident dose. Actual test dose applied was 60 mega rads of Gamma and 890 mega rads of Beta. Since SNUPPS requirements are 22.7 mega rads of Gamma and 152 mega rads of Beta the test dose applied did envelope SNUPPS require-ments.

The connector components are made of Ryton R-4, designed to tolerate high radiation exposure. Additionally, the metal outer sheath provides some shielding against exposure. Based on these facts, the additional radiation exposure is not anticipated to cause any changes in the previous successful test results.

The seismic simulation test was conducted oy shaker table using con-trolled multi-frequency test inputs. The connectors were subjected to five Operating Basis Earthquakes (OBE) and four Safe Shutdown Earthquakes (SSE).

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WESTINGHOUSE CLASS-3 The ~ LOCA vibration simulation test was conducted by shalier - table - using random multi-frequency test inputs. The connectors were subjected to five reconds of random inputs at levels described'by the PSD plot.

s Exastples of the test response sepctra - (TRS) shown.in Figures 4, 5, and 6 demonstrate adquate envelopment of the approp'riate RRS for the OBE, SSE, and PSD test levels, respectively. The OBE RRS is two-thirds of the SSE

.RRS.

2 throughout the test sequence no structural damage was observee and the connectors functioned properly.

A confidence ' test of the ef fect s of a LOCA environment on a new LEMO connector has shown no ef fect on the accuracy of the thermocouple reading. The confidence test consisted of two separate tests. In the first test two LEMO connectors were connected to two thermocouples at room temperature with a recorder attached to monitor results. One

^

connector was dipped in a solution of 2750 ppe boron adjusted to a pH of 10.7 at 250C with sodium hydroxide. The other connector was lef t exposed to a normal atmosphere. During the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> exposure period both channels of output maintained an accurate output. The second test was set up on the same manner except that the thermocouples were placed in a '

4000F oven and the connectors were both placed in. a dry test vessel.

One connector was fitted with Raychem splice material to provide a- i watertight seal. A 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> steam test on the connectors was performed (this would be the same test conditions used for all HELB testing .as discussed in estinghouse WCAP 8587 Methodology for Qualifying Westing-house WRD Suiplied NSSS Safety Related Electrical Equipment). During this 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, again both channels of output maintained an accurate output. These results are conside. red relevant to the question of performance of aged qualification units because the tendency for moisture to enter the unprotected connectors is the same for both new and agad samples. No evidence exists to suggest- that the connectors will be more sensitive to LOCA ef fects. Pending completion of the entire sequence of connector ' tes ts , the . results of the LOCA test of new connectors lend ,

. confidence of successful performance of the installed connectors. This l LEMO connector is the same as those installed at the SNUPPS plants.

[ Refer to SLNRC 84-0034 of February 23, 1984 for additional information.

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WESTINGHOUSE CLASS 3 Adaptors The thermocouple adaptors interf ace with SNUPPS supplied organic thermo-couple extension cable and consist of Thermoelectric connectors rein-forced with Raychem heat shrink tubing to prevent separation. The adaptors have been subjected to the same accelerated thermal aging, irradiation and seismic simulation as the LEMO connectors with successful results. Since the design basis accident sequence has not been performed, a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> confidence test was run on unaged Thermoelec-tric connectors with heat shrink tubing attached. Two Thermoelectric connectors were connected to thermocouples placed in a 4000F oven. A 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> steam test - (utilizing the same HELB test conditions as discussed in WCAP 8587) was performed on the connectors. Both channels maintained an accurate output throughout the test except for two periods where the outputs exhibited fluctuations. _These fluctuations coincided with oscillations in the chamber pressure due to a malfunctioning control valve. Post-test evaluation indicated that one of the connectors was in poor condition and it is postulated that the pressure oscillations may have caused a dif ferential pressure on the daychem tubing which expanded it and allowed movement between the connector contacts. Since these rapid pressure oscillations are not typical plant environmental condi-tions, it is concluded that the tested connectors would have pe rformed through a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period post accident. This Thermoelectric connector is the same as those installed at the SNUPPS plants.

Splices The splices which are to be used with the new-style Reference Junction

' Box are qualified as part of the ESE-44 program. The discussion of the Reference Junction Box below notes that the qualification program required a design change to improve the environmental sealing of the box. The installation of the improved new-style box requires a splice between the

. mineral insulated cable (which is part of the box) and the organic thermocouple extension cable. The splice consists of an Amp connector bonding the two wire ends, covered by Raychem heat shrink tubing. The entire splice area is surrounded by Dow Corning 738 sealant which is enclosed in a metal outer sheath. The sealant has excellent t

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WESTINGHOUSE CLASS 3 thermal qualities, (long term exposure to -850F to 3600F will not degrade its performance), good dielectric properties, and when broken down ia not corrosive. A confidence test, consisting of irradiation to 165 Mrads gamma and 1290 Mrads beta plus a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> steam test (utilizing the same HELB test conditions as discussed in WCAP 8587) was performed on two samples of the splice. One splice exhibited an intermittent output which, upon disassembly, proved to be a bad crimp on one wire.

The monitoring system for the other splice recorded an unexplainable offset for three minutes during the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test. Since, upon ins pec-tion, both splices appeared satisfactory (with the exception of the bad crimp), the confidence test is judged to have proven the capability of the splice to perform satisfactorily through the entire test sequence.

Due to the nature of the splice and the metho? of installation, the splice would not be subjected to any sttesses which would cause concern during a seismic event.

Pending completion of the entire sequence of tests on the final connec-tion system, the results of the LOCA test of connectors and adaptors lend confidence of stsccessful pe rformance of the installed equipment.

The LEMO cconnector and the Thermoelectric connector tested are the same as those installed at the SNUPPS plants.

Reference Junction Box (Old-Style)

The Reference Junction Box (RJB) has been aged, i r radiat ed and seismically tested successfully. The seismic simulation test was conducted on a shaker table using multi-frequency test inputs. The equipment was subjected to five (5) Ope rating Basis Earthquake (OBE) and four (4) Safe Shutdown Earthquake (SSE) events. The required SSE level is shown in Figure 8, and the required OBE level is 2/3 SSE. The T/C RJB

'as mounted to a rigid test fixture utilizing procedures provided in the Technical Manual for the Model (WX-34072 T/C Re fe rence Junction Box).

The mounting hardware (mounting blocks and spacers, bolts, nuts, and washers) used for mounting the T/C RJB was supplied with the T/C RJB.

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WESTINGHOUSE CLASS 3 Examples of test response spectra (TRS) shown in Figures 7 and 8 demon-strate adequate envelopment of the appropriate RRS for the OBE and SSE test levels, respectively. Throughout the entire test sequence no structural damage was observed and the RJB functioned properly.

However, a problem discovered prior to the LOCA test has altered the test program. During an external pressurization test it was discovered that the NEMA enclosure was not leak tight and would allow steam to enter the box during the LOCA test. Previous tests had revealed that RTD lead wires exposed to a staim environment would result in a substan-tial drop in the insulation resistance thus affecting the accuracy of the RTD. An attempt was made to seal the entire box with a silicone potting compound and perform a confidence test. If the potting method proved to be successful during the LOCA test, a new box was to be modified with the potting and the test program repeated.

During the confidence test of the potted box the measured insulation resistance dropped substantially on all three RTD's indicating the potting had not sealed the box and that the RTD lead wires were being exposed to steam.and caustic spray. However, a review of the data revealed little ef fect on the accuracy of the system (approximately 1%).

WRD is continuing the investigation of the apparent independence of insulation resistance and RTD performance. Present areas of investiga-tion include the significance of data acquisition circuit variations and possible electro-chemical ef fects resulting f rom test measurement voltages in the presence of an electrolyte, such as the H 380 /NaOH 3 caustic spray. Similar results are described by N. J. Selley in an

" Experimental Approach to Electrochemistry". In conjunction with the l investigation, the validity of existing IR measurement techniques used in establishing performance is being evaluated.

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The confidence test performed on the potted box demonstrated that the j probability of obtaining a true environmental seal on the box by this method was low and was not required for successful performance. After l

removal of the potting material from the qualification test unit, the LOCA test was repeated and followed by a post-accident simul'a tion. This post-accident simulation was performed for 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> at 2300F.

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WESTINGHOUSE CLASS 3 w

Upon completion of the test program it wac realized that because of the inadequate seal it would not be possible to take credit for Beta-shielding. This lack of shielding increased the required TID for the post-accident simulation to meet Westinghouse generic requirements. The test dose administered was adequate to simulate the 40 year normal operating dose prior to a seismic event.

Because of the inadequate seal, a concern has been raised over long term corrosion effects and potential hydrogen buildup to volatile levels due to containment spray reacting with the internal aluminum structure.

However, confidence and LOCA testing with steam and chemical spray have not shown evidence of chemical residue in the box which is believed to be due to the rapid equalization of pressure in the box. Therefore, this is a postulated concern not demons trat ed to occur during previous qualification testing.

In the interim, the results of testing to date demonstrate acceptable seismic qualification and short term post-accident environmental opera-tion of the existing box design for SNUPPS application.

Reference Junction Box (New-Style)

Attachment 1 is a draft Equipment Qualification Data Package (EQDP) which addresses environmental and seismic qualificatic,n of the new-style l RJB. The EQDP is considered to be a JIO in accordance with subparagraph (i) (2) of 10 CFR Part 50.49.

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WESTINGHOUSE CLASS 3 EQDP-ESE-44A Rev. O,12/84 EQUIPMENT QUALIFICATION DATA PACKAGE This document contains information, relative to the qualification of the equipment identified below, in accordance with the methodology of WCAP 8587. The Specification section (Section 1) defines the assumed limits for the equipment qualification and constitute interface requirements to the user.

Incore Thermocouple Reference Junction Box

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1 APPROVED:

E. P. Rahe, Manager Nuclear Safety Department WESTINGH0llSE ELECTRIC CORPORATION NUCLEAR ENERGY SYSTEMS -

P.O. BOX 355 PITTSBURGH, PENNSLYVANIA 15230 1

8104Q:10/120784

WESTINGHOUSE CLASS 3 SECTION 1 - SPECIFICATIONS 1.0 PERFORMANCE SPECIFICATIONS 1.1 Electrical Requirements [

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1.1.1 Voltage

N/A

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1.1.2 Frequency

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1.1.3 Load: N/A S 1.1. 4 Electromagnetic Interference: None

1.1.5 Current

2.5 mA 1.2 Installation Requirements: Thermocouple Reference .lunction Box in accordance with Westinghouse Drawing E-3217 Rev .

1.3 Auxiliary Devices: Thermocouples (EQDP-ESE-43A) M 43C Thermocouple Connectors (EQDP-ESE-43 )

Adaptor Cable Splice (EQDP-ESE-448) 1.4 Preventive Maintenance Schedule: Details of any preventive maintenance schedule, assumed in establishing the qualified life are specified in the instruction manual supplied with the equipment.

1.5 Design Life: forty years (40 yrs.)

1.6 Operating Cycles (Expected number of cycles during design life, including test): Continuous operation 81040:10/120784 2

1.1 Perfors.ance Requirements for(b): 1herinoccuple Reference Junction Box Containment D8E Conditions (a) Post D8E Conditions (a)

Normal Abnormal lest Parameter Conditions Conditions Conditions FLB/ stb M Seismic FLB/ stb LOCA }e15mic 1.1.1 Time requirement Continuous 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> fest <24 hrs. <24 hrs. Event 1 year 1 year Continuous duration duration 1.1.2 Performance Note c As normal No damage Note c Note c As normal Note c Note c As normal

requirement 1.8 Emirormental Conditions for Same Function (b) ,,

1.8.1 Temperature (*F) 50-120 Included Ambient Figure 41. Ambient /Td9er1>-2 Figure O Ambient under normal L8 M g ,[ p-1.8.2 Pressure (pstg) -0.1/+0.3 Ambient 10 Figure 4 1 Ambient Figure J L Ambient 1.8.3 Humidity 0-95 95 Ambient 100 100 Ambient 100 100 Ambient g m

(,RH) 2 dh y 1.8.4 Radiation (R)(d) 1.1x107 y None None C) .1 5t None 1.2x105 y 1.8x1058 1.3x108 y 1.3x1098 None g

1.8.5 Chemicals None None None h Figure % L None None None None luisk & Qw 1.8.6 Vibration Section None None f hone None None None None None "

4 2.10 t,dM 1.8.1 Acceleration (g) Pon- None None None None Figure 1 None None None Not:s: a: et is the Design Basis Eve-nt, b: Jargin is not included in the parameters of this section. '

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l WESTINGHOUSE CLASS 3 1.9 Qualified Life: The demonstrated qualified life for the Thermocouple Reference Junction Box has been [ laf4t) ,

1.10 Remarks: None -

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WESTINGHOUSE CLASS 3 SECTION 2 - OUALIFICATION BY TEST 2.0 TEST PLAN 2.1 Equipment

Description:

Thermocouple Reference Junction Box Model WX-34794 Westinghouse Drawing E-3220, Revision .

2.2 Number Tested: One Reference Junction Box

2.3 Mounting

Per section 1.2

2.4 Connections

Installation Procedure for Class 1E Reference Junction Box, and Plant Interconr.ect Drawings.

2.5 Aging Simulation Procedure: Sequential simulation of thermal and radiation aging of organic material l

as part of the overall test sequence.

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5 8104Q:10/120784

2.6 Service Conditions to be Simulated by Test (l): Thermocouple Reference Junction Box Containment Normal Abnormal Test Seismic HELB Post-HELB 2.6.1 Temp. (*F) 50-120 Included Nohe Ambient Figure 2 Figure 2 under normal i 2.6.2 Pressure (psig) 0 Included Included Ambient Figure 2 Figure 2 j under normal under HELB Humidity Ambient Included Included Ambient 100 100 2.6.3 (percent RH) under normal under HELB 2.6.4 Radiation (R) 1.65x108 Y Included None None Included Included under normal under under normal normal None None Note (a) None l

2.6.5 Chemicals None None i

Vibration None None None None None 2.6.6 None None None TRS > RRS None Hone 2.6.7 Acceleration (g) None Figure l Note (a): The spray solution contains 2750 ppm Boron issolved in water and buf fered with sodium hydroxide to maintain a pH of 10.7. ,

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WESTINGHOUSE CLASS 3 2.7 Measured Variables: Thermocouple Reference Junction Box This section identifies the parameters required to be measured during the test sequence (s).

2.7.1 Category 1 - Environment Required Not Reauired 2.7.1.1 Temper 6ture B,E A,C,0 2.7.1.2 Pressure E A,B,C,0 2.7.1.3 Moisture -

A,B,C,0,E 2.7.1.4 Gas Composition -

A,B,C,D,E 2.7.1.5 Vibration C A,B,D,E 2.7.1.6 Time B,C,0,E A 2.7.2 Category II - Input Electrical Characteristics 2.7.2.1 Voltage C,E A,B,0 2.7.2.2 Current - A,8,C,0,E 2.7.2.3 Frequency - A,B,C,0,E 2.7.2.4 Power - A,B,C,D,E 2.7.2.5 Other - A,B,C,D,E 2.7.3 Category III - Fluid Characteristics 2.7.3.1 Chemical Composition E A,B,C,0 2.7 3.2 Flow Rate E A,B,C,0 2.7.3.3 Spray I A,B,C,D 2.7.3.4 Temperature E A,B,C,0 2.7.4 Category IV - Radiological Features 2.7.4.1 Energy Type h j@D A,B,C.E 2.7.4.2 Energy L ve D A,B,C,E 2.7.4.3 Dose R(te g D. A,B,C,E l 2.7.4.4 Integra "s D A,B,C,E f7 8104Q:.1D/,120784 __. ,

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WESTINGHOUSE CLASS 3 Reauired Not Reauired 2.7.5 Category V - Electrical Characteristics 2.7.5.1 Insulation Resistance A,E B,C,0 2.7.5.2 Output Voltage - 1. , B , C , D , E 2.7.5.3 Output Current - A,B,C,0,E 2.7.5.4 Output Power - A,B,C,0,E 2.7.5.5 Response Time -

A,B,C,0,E 2.7.5.6 Frequency Characteristics - A,B,C,0,E 2.7.5.7 Simulated Load - A,B,C,0,E 2.7.6 Category VI - Mechanical Characteristics 2.7.6.1 Thrust - A,B C.D.E 2.7.6.2 Torque - A,B,C,0,E 2.7.6.3 Time - A,B,C D.E 2.7.6.4 Load Profile - A,B,C,0,E 2.7.7 Category VII - Auxiliary Equipment None f

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WESTINGHOUSE CLASS 3 2.8 Test Sequence Preferred This section identifies the test sequences as specified in IEEE 323-1974 2.8.1 Inspection of Test Item 2.8.2 Operation (Normal Condition) 2.8.3 Operation (Performance Specifications Extremes, Section 1) 2.8.4 Simulated Aging

.19 2.8.5 Seismic Simulation 3 g 2.8.6 Operation (Simulated High Energy Line Break Condition i >

2.8.7 Operation (Simulated Post HEL8 Corditions) ,

.j 2.8.8 Inspection

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i bi 2.9 Test Sequence Actual This section identifies the actual test sequence whic stitutes the qualification program for this equipment. A justification for anything other than the preferred sequence is provided. The normal operating test condition referred to is a resistance check. This is included to more readily identify effects of the various test conditions on the test equipment. Performance under abnormal operating conditions is covered under Sections 2.8.2 and 2.8.6.

2.9.1 Test Sequence for Reference Junction Box (from Section 2.8):

Step 2.8.1 Inspection 2.8.2 Operation-Nornal Condition (Resistance Check) 2.8.4 Thermal Aging, Thermal Cycling 2.8.2 Resistance Check 2.8.4 Radiation, Normal and Post-Accident 2.8.2 Resistance Check 2.8.5 Seismic Simulation 8104Q:10/120784 9

l WESTINGHOUSE CLASS 3 2.8.2 Resistance Check 2.8.6 High Energy Line Break Simulation 2.8.7 Post HELB Simulation p 2.0.2 Resistance Check 2.8.0 Inspection 2.8.3 N/A ,

'i 2.10 Type Test Data 2.10.1 Objective The objective of this test program is to demonstrate, employing the recomended practices of Reg. Guide 1.89 (IEEE 323-1974) and Reg. Guide 1.100 (IEEE 344-1975), the capability of the Incore Thermocouple Reference Junction Box to complete its safety-related functions described in EQDP Section 1.7 while exposed to the applicable environments defined in EQDP Section 1.8.

i 2.10.2 Equipment Tested

One (1) Reference Junction Box, as described in Section 2.1, was subjected to the test environments of the sequence shown in Section 2.9.1.

f 2.10.3 Test Summary l

l 2.10.3.1 Normal Environment Testing The operation of the Reference Junction Box under l_

normal conditions is reflected by the numerous l resistance checks performed between each phase of I the test sequence and reported in Reference 1.

l 8104Q:10/121684 10 l

4 WESTINGHOUSE CLASS 3 2.10.3.2 Simulated Aging The test unit was pre-conditioned to a simulated

[/i2fr ) aged condition prior to subjecting it to the design basis seismic event and high energy line break simulation. The aged condition was achieved by separate phases of accelerated thermal aging, radiation exposure to a total integrated gamma dose equivalent to a [M) normal dose plus the design basis accident dose. Through all the pre-conditioning phases, the outputs were monitored to verify continuous operation.

2.10.3.3 Seismic Tests The seismic testing reported in Reference 1 was completed on aged equipment employing multi-frequency multi-axis inputs in accordance with Regulatory Guide 1.100 (IEEE 344-1975).

Figure 1 shows the Safe Shutdown Earthquake (SSE) required response spectrum (RRS) in the control direction of the shaker table. The Operational l

Basis Earthquake (OBE) RRS was two-thirds (?/3) of the SSE level. All test response spectra (TR3) curves were plotted against the RRS and we-(~

verified to meet or exceed the RRS. However.: 11ch plant should compare their actual plant requirements to the principal axis RRS (control directionRRSdividedbyafactorof-[2)toassure l

I that sufficient margin exists based on the actual equipment mounting location. M 11 81040:10/101084 . - - - _

WESTINGHOUSE CLASS 3 2.10.3.4 High Energy Line Break / Post HELB Simulation The Thermocouple Reference Junction Box was subjected to the HELB simulation temperature profile of Figure 2. The testing included simulating a twelve-month period of post-HELB operation.

2.10.4 Conclusion The qualification status of the Thermocouple Reference Junction Box is demonstrated by the completion of the Design Basis Event condition testing described herein and reported in Reference 1.

2.11 Notes The generic tec+s completed by Westinghouse employ parameters designed to ens' lope a number of plant applications. Margin is a plant specific parameter and will be established by the applicant.

2.12 References

1. Chang, M. S., Riedl, T. J., " Equipment Qualification Test Report, Thermocouple Reference Junction Box," WCAP-8687, Supplement 2-E44A (Proprietary).

WESTINGHOUSE CLASS 3 SECTrog , IflCAyggy #ERIEygg Westinghouse does not employ operating experience in support of the qualification program for the Thermocouple Reference Junction Box.

DRAR R

WESTINGHOUSE CLASS 3 SECTION 4 - OUALIFICATION BY ANALYSIS Analysiswasperformedinlieuofsimulatingbytesttheactualgeta radiation extremes expected during accident operating conditions.

i 4

TABLE 1 ACTUAL QUALIFICATION TEST CONOITION QUAL MANUFACTURER ASNORMAL/ ACCIDENT ENVIRON. EXTREMES OPERASILITY ACCURACY (3) QUAL QUAL QUAL PROGRAM EQUIPMENT (1) LOCATION SYSTEM / CATEGORY STRUCTURE / AREA TYPE /N00EL PARAMETER SPEC. (2)._ QUAllFIED R,,19 R[]!_ !{g R{J1 UIL METH00 R{f_ STATUS Temperature 420*F Post Same, - - Seq. ESE- Complete Ref:rence Containment W-lGTO ,

WK-34194 Pressure 51 psig 12 me. Test 44 Junction Box / Bldg./

PAMS/ Category a Rel. Humidity 1005 i 6 l Radiation 165x10 A(T) 8 130x10 A(8)

Cheitstry 2750 ppe "3"3 l; NaOH 10.7pH l l

4 NOTES:

1. For definition of the category letters, refer to NUREG-0588

• Interim Staf f Position on Env1'ronmental Qualificatten of Safety-fielated Electrical Equipment.* Appendix E Section 2.

2. Plant specific environmental parameters are to be inserted by the applicant.

3. Accuracy 12.55 of measured value.

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