IR 05000460/1981005
| ML20009E187 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 06/11/1981 |
| From: | Agee J, Bennett, Le N, Minor E, Naidu K, Reinmuth G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE), Office of Nuclear Reactor Regulation, SANDIA NATIONAL LABORATORIES |
| To: | |
| Shared Package | |
| ML20009E186 | List: |
| References | |
| 50-460-81-05, 50-513-81-05, NUDOCS 8107270201 | |
| Download: ML20009E187 (8) | |
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J. S. NUCLEAR REGULATORY COMMISSION
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// M Ce i d by, OFFICE OF INSPECTION AND ENFORCEMENT Report No.: 50-460/81-05; 50-513/81-05
1 Licensee: Washington Public Power Supply System 3000 George Washington Way Richland, WA 99352
Cog..innt Design Organization:
1.
Burndy Corporation 2.
United Engineers A Constructors, Inc.
Norwalk, CT 06856 30 South 17th Street Philadelphia, PA 19101 Equipment Environmental Qualification Program:
Independent Verification Inspection No. 3 Report No.1 - Review of Environmental Qualification Test Plans - Burndy Terminals & Target Rock Solenoid Valves Equipment Identification:
Manufacturer: Burndy Manufacturer: Target Rock Component: Ring - Type Component:
1" Solenoid Valve, Globe Terminations as
Follows :
Type: Model 79LL-001 Type:
Serial No.:
Serial No.: 1032110-4-6-1-S YAES 17K-8 1032110-4
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YAV 14 1032110-6 YAV k4TI 1032110-1 YAES 14-K 1032110-5 Inspection Conducted: April 21-23, 1981
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Inspectors:
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K. R. Naidu, Region III, IE Date
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bL hh J. R. Agee, Region IV, IE
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Date 8107270201 810701 PDR ADOCK 05000460 G
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A. B. Bennett, Vendor and Special Projects Date Branch, IE
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_N. B. Le Equipment Qualificatf orrBranch, Date
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Division of Engineering, NRR g)
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E. E. Minor, NRC Consultant, Sandia National Date Laboratories Observer:
R. T. Dodds, Chief, Reactor Construction Projects, Section 2, Region V
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Approved By:
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G. W. Reinmuth, Chief, Vendor and Special Projects Date Branch, DRRRI, IE Summary: The purpose of this inspection was to discuss WPPSS's equipment environmental qualification program plans and to review selected portions of their program such as schedules for testing, equipment importance regarding safety function and equipment usage by WPPSS.
WPPSS informed the inspection team that environmental qualification test programs were being scheduled for the following equipment:
Burndy terminations Dresser pressure switches Johnson Controls level transmit 2rs Target Rock solenoid valves Based on discussions of the WPPSS overall equipment enviror.mantal qualification testing program with cognizant engineering manage-ment personnel, the Burndy terminations and Target Rock solenoid operated valve _ test programs were selected and examined in detai. =..__- -
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The NRC's role in the equipment environmental qualification test programs was discussed. The review of the selected qualification programs will include the review of the test plans (addressed in the details section of the enclosed inspection report), observation of specimen preparation testing (such as thermal aging), inspection of test facil'L.es and observations of accident environmental testing (LOCA/MSLB).
I A site tour of Unit 1 was performed at the conclusion of.the test
' document review meetings.
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DETAILS SECTION Prepared By:
K. R. Naidu A.
Persons Contacted
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1.
Washington Public Pcwer Supply System'(WPPSS)
R. Abbott, Senior Engineer K. Brun, Engineering Records Analyst K. A. Hadley, Licensing Engineer A. Joshi, Senior Engineer N. S. Porter, Systems Engineering Manager U. Shah, Chief, Electrical Engineering G. C. Sorensen, Manager, Licensing 2.
Gurndy Corporation R. Lai, Laboratory Supervisor T. Lund, ifanufacturer's Representative E. S. Raila, Manager, Power Project Development 3.
United Engineers and Constructors R. B. Rock, Electrical Engineer B.
General Discussions 1.
Burndy Terminations The electrical terminations environmental qualification test program is being parformed by Burndy, with application input from WPPSS. The Burndy qualification test program is intended to be generic, using a temperature / pressure / time profile that would encompass the accident profiles of a number of applications. The inspectors informed WPPSS and Burndy that NRC is interested in the program on a system basis, which includes the junction box, wiring, conduit and associated inter-face equipment. Burndy intends to qualify type YAES 14K-8 KYNAR insulated t 'minals and type YAV 14 and YAV 14-TI, bare copper terminals.
Three assemblies will be tested, employing NEliA 3 junction boxes, con-taining the above terminals attached to wires and connected to terminal blocks. The input provided by HPPSS includes specifying interface
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equipment details, design basis accident temperature / pressure / time profiles and review of the test plan.
2.
Target Rock Solenoid Operated Valves The Target Rock solenoid operated valves are used in the sampling lines of the containment atmosphere and radiation monitoring systems. The environmental qualification test program will be performed by Target Rock Corporation, with review and approval responsibility by United
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Engineers and Constructors, Inc. and WPPSS. The NRC is interested in monitoring the qualification test program based on its application in safety-related systems, location in containment (subjected to postulated design basis accident) and use of materials that are considered to be sensitive to a radiation and thermal environment.
C.
Review of the Test Plan for Burndy Ring-Type Terminations 1.
Objectives To ascertain that the test plan proposed by Burndy to qualify the ring-type terminations meets the criteria and guidelines outlined in IEEE 323-1974 and NUREG-0588.
l 2.
Findings
a.
Equipment Thermal Aging
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Burndy stated that some of the terminals that will be included in the environmental qualification test have been pre-aged and the j
information documented in Burndy reports TD 79-595A and TD 80-512.
Thesa reports are recorded in the test plan.for reference. These procedures were not reviewed by the inspectors.
Burndy stated that Arrhenius methodology was used to derive the accelerated thermal aging values to represent a 40 year life at a maximum operating temperature of 90 F.
The precise material makeup of the KYNAR insulation sleeves, the critical component of the insulated terminals, is not given in the test plan. A review of the activation energy (eV) value used for the sleeves based upon the service temperature and time appears to be higher (1.69 eV) than the value assumed by the manufacturer (1.18 ey). This wouid result in a qualified life of less than that assumed by the ma nufacturer. Burndy will provide additional information in the test plan on the proposed thermal aging including the activation energy value of the KYNAR material, how degradation was measured, and what failure mode was used. The qualified life calculations will be verified by Burndi.
b.
Monitoring of Test Parameters and Use of Test Instrumentation The test plan did not clearly state the monitoring requirements for the critical test parameters during the LOCA/MSLB test.
In addition, a listing of the test instruments required for monitoring the test parameters was not given. Burndy advised that the test plan would be revised to include test monitoring requirements and a listing of test instruments, including resolution and m curacy requirements.
Continuous recording of the test parameters by automatic chart
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-3-readout during the first few hours of the LOCA/MSLB environmental test will also be considered by Burndy. One of the test parameters being measured is leakage current, and the present acceptar.ce criterion of less than 1 ampere is specified in the test plan.
It was reouested that Burndy justify this value considering a typical circuit application enployed by WPPSS.
It was suggested that leakage current measurements be taken before, during and after the test for comparative purposes.
c.
. Test Margins The test plan did not clearly explain the margins employed to establish the LOCA/MSLB profile parameters. Burndy will provide data to identify and justify the margins applied to establish the test profile. WPPSS will review the profile chosen for plant specific require 'nts.
d.
Test Environment The terminations are installed inside vented NEMA 3 enclosures mounted inside the test chamber. The test conditions include steam and chemical spray at various temperatares and pressures, as specified in the test plan. Burndy advised that a study or test would be perfcrmed on the NEMA 3 enclosure prior to the LOCA/MSLB test to verify that adequate venting exists to preclude enclosure collapse during the LOCA/MSLB test.
Burndy advised that the test plan would be revised to (1) specify the chemical spray temperature and pressure at time of injection into the chamber and (2) specify that the environmental testing does not include flooding to call the user's attention to the fact that the terminations and enclosure must be installed in the plant above the flood level.
D.
Review of the Test Plan for the Target Rock Solenoid 'oerated Valves 1.
Objectives
To evaluate the Target Rock test plan for environmental qualification of a 1" solenoid operated globe valve, and determine whether the test plan satisfies the guidelines of IEEE 323-1974 and NUREG-0588.
To review the purchase specifications for the solenoid valve and establish whether proper procurement control is being exercised.
2.
Findings
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a.
Equipment Thermal Aging Arrhenius methodology is used to establish thermal aging parameters.
A conservative value of activation energy (0.5 eV) was selected
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based upon the use of s-lid state diodes. The accelerated agiijg
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time is 38 days. The ormal service temperature of 108*F (315 K)
was used to compute the accelerated aging. The accelerated thermal aging tmperature selected is 335'F (441*K). The aging temperature includes a 15 F margin. The term " equivalent integrated life temperature" is used as a basis for computing the normal service
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temperature. The ambient temperature range of 55* - 135*F was given. The term " equivalent integrated life temperature" should be clarified in the test plan to justify the use of 108'F service temperature in the accelerated temperature aging calculations.
The valve is being qualified to simulate actual in-service conditions, that is, normally aciergized. The inspectors stated that having
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the coil energiged during accelerated thermal aging may not adequately represent the I R contribution in the aging temperature and time requirements. The " accelerated themal aging tempgrature" calcu-lations will be verified by UE&C considering the I R contribution and the NRC will be informed of the results.
b.
!'onitoring of Test Parameters and Use of Test Instrumentation The test plan did not include a list of test equipment required for monitoring the test parameters. UE&C stated that the test plan would be revised to list the test equipment to be used, including i
resolution and accuracy requirements.
In addition, the performance of a calibration check at the end of the test would be specified.
At the end of each test sequence the valve will be tested to Productions Test Procedure TRP 252C excluding the hydrostatic test. The licensee will consider establishing an acceptance criterion of leakage through the -'em following the varicu's
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test sequences.
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Test Environment UE&C stated that the test plan would be revised to specify the pressure and temperature of the chemical spray during injection inco the test chamber.
The licensee stated that an analysis will be performed to determine the main steam line break (MSLB) parameters tr assure that the en-vironmental test encompass the fiSLB profile.
The licensee will verify that the solenoid operated valves will
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be installed above flood level and UE&C will address this en-vironmental condition in the test plan.
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General Only one valve is being tested. During a discussion on the use of only one valve, the NRC inspectors suggested that consideration be given to using additional valves for backup purposes ind expose-the backup valves to pre-aging in the event of failure of the one specimen.
e.
Review of the Purchase Specifications The results of a review of the purchase specification for procurement of the solenoid operated valves indicated that proper control is specified in the areas of CA, technical review, source and receiving inspection requirements and 10 CFR Part 21 reporting requirements.
E.
Exit Interview The inspectors met with licensee management representatives denoted under
" Persons Conta ced" and summarized the purpose and findings of the inspection.
In addition to the specific comments discussed herein, the inspection team offered the following comments:
1.
The sponsoring activity preparing future test plans should consider addressing the following subjects in the test plan:
a.
Include a general philosophy statement, giving the reason for the test, a statement of function and location, system installed in and special operating features.
b.
Include a description of how the specimen will be selected for the environmental test.
c.
Include discussions on thermal, radiation, seismic and wear aging, including any other aging mechanisms a.d justify the aging parameters selected.
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Specify the number of spec.imens included in the test, number of backup units and aging history of backup units (if different from the test specimens).
2.
The WPPSS management and contractor representatives advised that the inspection team comments would be appropriately considered prior to conduct of the tests.