ML20069B284
| ML20069B284 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/20/1994 |
| From: | William Cahill, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-90-001, IEB-90-1, TXX-94139, NUDOCS 9405270130 | |
| Download: ML20069B284 (3) | |
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.===e Log # TXX-94139
" """ M File # 10119 2
883E IE} Ref. # NRCB 90-01 Supplement 1 TUELECTRIC May 20, 1994 William j, Cahnl. Jr. q Gwup Voct Prnident U. 5. Nuclear Regulatory Commission Attn: Document Control Room Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) DOCKET NOS. 50-445 AND 50-446 RE0 VEST FOR ADDITIONAL INFORMATION ON TRENDING OF ROSEMOUNT TRANSMITTERS AS REQUIRED BY NRC BULLETIN 90-01 SUPPLEMENT 1, " LOSS OF FILL-0IL IN TRANSMITTERS MANUFACTURED BY ROSEM0UNT* REF: 1) TU Electric letter logged TXX-93015, from William J. Cahill, Jr. to the USNRC, dated January 13. 1993. 2) TV Electric letter logged TXX-993090, from William J. Cahill, Jr. to the USNRC, dated February 19, 1993. Gentlemen: On May 9,1994, during a telephone conversation, the NRC requested additional information on the TV Electric Rosemount Transmitter Monitoring and Trending Program. As a result of that request TU Electric hereby submits this supplement to its response to NRC Bulletin 90-01 Supplement 1, " Loss of Fill Oil in Transmitters Manufactured by Rosemount." As stated in TXX-93015, CPSES Unit 2 Rosemount transmitters are of post July l 11, 1989 manufacture and are not required to be monitored, in TXX 93090 TU Electric had nine transmitters in high pressure applications (greater than 1500 psi) which were being monitored, twenty-two in medium pressure applications (greater than 500 and less than or equal to 1500 psi) which i were also being monitored, and twenty-five in low pressure (less than or l equal to 500 psi) applications which were not included in the monitoring program. The nine Unit 1 transmitters in high pressure application have-been replaced with new or refurbished transmitters of post July 11, 1989 manufacture. Additionally, as stated in TXX-93090, the twenty-two transmitters in medium pressure (greater than 500 and less than or equal to 1500 psi) applications will be monitored until the transmitter has met the Rosemount psi-month threshold criterion for a mature transmitter. The monitoring program applies only to the twenty-one Unit.1 transmitters which, to date, have not reached the psi-month threshold. ow n n. 9405270130 940520 f' l) D .hDR ADOCK0500g5 g,g,gg3 ~:1 m
o T,XX-94139 Page 2 of 3 A. A Technical Support Procedure which: 1. Assigns departmental responsibility for various aspects of the program, 2. Provides information on the transmitter failure mechanism, 3. Defines frequency of monitoring and data collection, 4. Establishes the cumulative drift criteria for determining suspect transmitters, 5. Defines the data reduction and analyses procedures, 6. Establishes the acceptance criteria, 7. Establishes reporting and notification requirements of the program, and 8. Includes attachments which identify all transmitters in the monitoring program and provides guidance to operations personnel in detecting failed transmitters. B. An Instrument and Control Maintenance Procedure which provides guidelines for testing transmitters at pressures outside the calibrated span to detect sluggish response. The program incorporates the guidelines of Rosemount Technical Bulletins 1 through 4. If you have any questions please contact Mr. Jose' D. Rodriguez at (214) 812 8674. Sincerely, w% 94AUS)&>, William J. Cahill, Jr. 'I By: M Roger 15. Walker Regulatory Affairs Manager i i JDR/ c-Mr. L. J. Callan, Region IV Resident Inspectors. CPSES Mr. T. A. Bergman, NRR
4 T8X-94539 Page 3 of 3 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter of ) a ) Texas Utilities Electric Company ) Docket Nos. 50-445 ) 50-446 (Comanche Peak Steam Electric) ) Station, Units 1 & 2) ) AFFIDAVIT Roger D. Walker being duly sworn, hereby deposes atI says that he is Regulatory Af fairs Manager of TV Electric, that he is duly authorized to sign and file with the Nuclear Regulatory Commission this supplementary information to TU Electric's submittal for NRCB 90-01 Supp. 1; that he is familiar with the content thereof; and that the matters set forth therein are true and correct to the best of his knowledge, information and belief. Roger D. Ealker Regulatory Affairs Manager STATE OF TEXAS ) ) COUNTY OF ) Subscribed and sworn to before me, a Notary Public, on this 23 ~O R day of MM
- 1994, 7
4 u f Notary Public JOHN S. MARSHALL Notory Pubac . *' ccws 1-14-98 _~}}