TXX-6574, Interim Deficiency Rept CP-87-08 Re Accuracy Tolerance of Calibr of Dead Weight Tester Used as Std in Calibr Pressure Instrumentation.Initially Reported on 870420.Evaluation Underway.Next Rept Will Be Submitted by 871023
| ML20235Y272 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/21/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-08, CP-87-8, TXX-6574, NUDOCS 8707250178 | |
| Download: ML20235Y272 (2) | |
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Log # TXX-6574
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File # 10110 907.0
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Ref: 10CFR50.55(e) illELECTRIC William G. Counsli Execunvc he President U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 CALIBRATION ACCURACY OF PRESSURE STANDARD (DEAD WEIGHT TESTER)
SDAR: CP-87-08 (INTERIM REPORT)
Gentlemen:
On April 20, 1987 we verbally notified your Mr. Cliff Hale of a deficiency regarding the accuracy tolerance of calibration for a Dead Weight Toster 1: sed as a standard in calibrating pressure instrumentation.
This tester has been used in the Operations (Instrumentation & Controls) test / maintenance program.
This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e). Our latest report was logged TXX-6456, dated May 20, 1987.
We have reviewed all calibration standards used in the Operations (Instruments Controls) Program and have identified the following standards which do not meet the required accuracy tolerances.
fi&J1 TAG #
DESCRIPTION T'(PE 1C-0172 Multimeter Calibrator Temperature 1C-0180 Pneumatic Dead Weight Tester Pressure IC-0181 Dead Weight Tester Pressure 10-0182 Dead Weight Tester Pressure 10-0183 Pneumatic Dead Weight Tester Pressure 10-0280 Digital Pressure Indicator Pressure 10-2304 U-Tube Manometer Pressure Currently, we are evaluating the effect of these inaccuracies on programs important to safety (for example, cold hydrostatic tests, preoperational tests,etc.).
8707250178 870721 PDR ADOCK 0500 5
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400 North Ohve Street LB 81 Dallas, Texas 75201 N
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TXX-6574 July 21, 1987 Page 2 of 2 The above evaluation is scheduled for completion by September 30, 1987. We will submit our next report on this issue by October 23, 1987.
Very truly yours, X.
hl I
W. G. Counsil
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By:
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1.
G. S. Keeley
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Manager, NuclGTF ensing BSD/mlh c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) 1
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