ML20070N828
| ML20070N828 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 04/29/1994 |
| From: | Shelton D CENTERIOR ENERGY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 1-1041, IEB-90-001, IEB-90-1, NUDOCS 9405090307 | |
| Download: ML20070N828 (3) | |
Text
.-.
.. ~.
l
>I CENTERIOR ENERGY e
6200 0ak Tree Boulevard Mail Address Donald C.Shelton Independence OH R0 Box 94661 Senior Vice President 216-447 3153 Cleveland. OH 44101-4661 Nuclear Fox 216-447 3123 Docket Number 50-346 License Number NPF-3 Serial Number 1-1041 l
April 29, 1994 l
United States Nuclear Regulatory Commission i
Document Control Desk j
Vashington, D. C.
20555 l
Subject:
Supplemental Response to NRC Bulletin Number 90-01, Supplement 1, " Loss of Fill-0il in Transmitters Manufactured by Rosemount" Gentlemen:
By letter dated March 5, 1993 (Serial Number 1-1005), Toledo Edison (TE) provided its response to NRC Bulletin 90-01, Supplement 1, " Loss of Fill-Oll in Transmitters Manufactured by Rosemount." Since the submittal of TE's response, telephone conversations between the NRC staff and the TE staff were conducted on September 24, 1993, and March 9, 1994 to discuss the information provided by TE.
provides TE's responses to the issues raised during the aforementioned discussions.
Should you have any questions concerning this information, please contact Mr. Villiam T. O'Connor, Manager - Regulatory Affairs, at (419) 249-2366.
Very truly yours, f$~
(
N /d cc:
J. B. Martin, Regional Administrator, NRC Region III S. Stasek, DB-1 NRC Senior Resident Inspector G. Vest, Jr., NRC/NRR Project Manager Utility Radiological Safety Board O S C C
- Yperating Companies.
fI I'
9405090307 940429 PDR ADOCK 05000346 l
Clevoland Electnc illuminating O
PDR g
Toledo Edison
__ y
1 Docket Number 50-346 7
License Number NPF-3 Serial Number 1-1041 Page 1 l
Response to Request for Additional Information on NRC Bulletin 90-01, supplement 1 Item 1 In Attachment 1 to Serial Number 1-1005, Page 1, Action 1.a., TE stated that transmitter PT6365A vill be replaced during the current j
refueling outage (8RFO) with a new range code 9 transmitter and t
l subsequently vill not be subje-t to the requirements of NRC Bulletin 90-01, Supplement 1.
Vas this transmitter replaced?
TE Response to Item 1 PT6365A, Reactor Coolant System (RCS) extended range pressure l
l transmitter was replaced during the Eighth Refueling Outage (8RFO) on March 18, 1993 with a new range code 9 transmitter (Model 1154GP9, Serial Number 503820) per Haintenance Work Order (HV0) 3-93-4833-01.
Since the new transmitter was manufactured after July 11, 1989 it is not subject to the requirements of NRC Bulletin 90-01, Supplement 1.
Item 2 In the Reporting Requirements section of NRC Bulletin 90-01, Supplement 1, the NRC requested that TE provide a statement confirming that Items 1 and 2 of the Requested Actions for Operating Reactors in NRC Bulletin 90-01, supplement I have been completed.
In Attachment 1 of Serial Number 1-1005, Page 5, TE stated that Davis-Besse vill complete licensee actions required to meet Requested Actions 1 and 2 by the completion of BRF0.
Have these actions been completed?
TF Response to Item 2 E
TE completed the actions required to meet NRC Bulletin 90-01, Supplement 1, Actions 1 & 2 during 8RF0 as the replacement of PT6365A vas the only outstanding item identified in the response to the NRC Bulletin Supplement.
1
Docket Number 50-346 License Number NPF-3 9
Serial Number 1-1041
- Page 2 Item 3 In Attachment 1 to Serial Number 1-1005, Page 2, Action 1.b., TE stated that transmit ters LT5448B, LTRC14-1 and LTRC14-3 have exceeded the psi-month threshold (>130K psi-months). Transmitters LTRC14-1 and LTRC14-3 measure pressurizer level and provide indications, alarms, interlocks, and level control input to normal make-up line flow control valve MU-32.
These transmitters are redundant and either of the two can be selected to provide the alarm and control functions in the event one fails. Transmitter LT5448B provides Post Accident 1
i TE vill Monitoring indication of reactor coolant system inventory.
establish a once per refueling cycle enhanced surveillance program (ESP) interval for these transmitters due to demonstrated satisfactory performance as trended since the original NRC Bulletin Number 90-01.
Transmitter FTHU31, make-up flow transmitter (vide range), uses the same flov element but is not truly redundant to FTHU34 which is calibrated for narrow range indication. However, a once per refueling cycle ESP interval vill be established for FTHU31 cc it has exceeded the psi-month threshold and a failure vill not adversely affect operability of the make-up system.
How does TE define satisfactory performance?
TE Response to Item 3 TE considers transmitters to be performing satisfactorily based upon an evaluation of the following:
(1) As found data from transmitter calibrations compared to previous as left data.
(2) Observed drift compared to that given in Rosemount Technical Bulletin No. 4.
l (3) Trending program (using computer points) for transmitter performance.
(4) During transmitter calibrations, technicians specifically look for sluggish or abnorma! transmitter performance.
FTMU31 was installed on November 12, 1988 and presently has 175,000 psi-months of operation (i.e., 70 months with an operating pressure of 2500 psi).
Although FTHU31 (Model 1154HP6, Serial Number 415081) was manufactured prior to July 11, 1989, it has exceeded the psi-month threshold (> 60K psi-months).
As stated in the previous response (Serial Number 1-1005), the performance of FTMU31 has been satisfactory using the guidelines described above.
FTHU31 vill continue to be calibrated at an 18 month interval (i.e., once per refueling cycle).
w
'* -