ML20210C295
| ML20210C295 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 05/04/1987 |
| From: | Rossi C Office of Nuclear Reactor Regulation |
| To: | Charbonneau A MOVATS, INC. |
| References | |
| IEB-85-003, IEB-85-3, NUDOCS 8705060147 | |
| Download: ML20210C295 (3) | |
Text
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HAY 0 4 887 Mr. A. G. Charbonneau, President M0 VATS Incorporated 2995 Johnson Ferry Road Marietta, Georgia 30062
Dear Mr. Charbonneau:
My staff has recently completed its review of Union Electric Company's March 5, 1987, revised response to IE Bulletin 85-03, " Motor-Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings", for the Callaway Plant. As you know, this response contained your generic program for satisfying the requirements of the bulletin.
The review of this response indicates that there is still a need for additional information before the program to assure motor-operated valve operability can be approved. The specific comments have been forwarded to Union Electric Company via the appropriate NRC regional office.
In addition, in the interest of expediting resubmittal of the plan, which has potentially generic implica-tions to a number of other facilities, a copy of these comments is enclosed for your consideration in preparing your revised submittal via Union Electric Company.
Sincerely, Original Signed by Charles E. Rossi Charles E. Rossi, Director Division of Operational Events Assessir.ent Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information for Callaway 1 DISTRIBUTION RWStarostecki, NRR FMiraglia, NRR CERossi, NRR CHBerlinger, NRR RJKiessel, NRR FCCherny, itRR'$64 00Rothberg,$RR RJ 6 PRWohld, RIII DOEA R/F OGCB R/F l
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Enclosure Page 1 of 2 REQUEST FOR ADDITIONAL INFORMATION (RAI) RE:
REVIEW OF RESPONSES TO ACTION ITEM E OF I Licensee:
Union Electric Company Unit:
Callaway 1 1901 Gratiot Street Date of Response:
03/05/87 St. Louis, Missouri (Response to Initial RAI)
Respondent:
Donald F. Schnell Vice President, Nuclear The information provided in your responses to 85-03 was found to be deficient in some areas. Action Item e of IE Bull information requested by the following comments and questions:Please 1.
Referring to Enclosure 1 (Page 1) of the latest 03/05/87, note response to RAI Question 1:
of the "Due to the results of this (MOVATS') resear;h submittal to no longer require one time AP testing in the open di
, we have revised our on."
that the MOVATS data base does not include glo e 1, note less than 1.75 or greater than 2.0 inches.
orifice sizes We note that four 4-inch motor operated globe valves (HV 5 located in discharge lines of the AFW motor-driven pumps
, 7, 9 & 11) are 1-1/2-inch motor operated globe valves (HV-8813 & HV-88148) a
, and that two miniflow lines leading from the HHSI pumps to the RWST re located in Will representative samples of these globe valves be delta P t open direction?
ested in the 2.
Please refer to Enclosure 2 (Page 3) of the latest response of revision of procedures for Phase II is scheduled for July 1 Completion This date does not agree with the date of March 15
, 1987.
Phase II on Page 6 of Enclosure 2.
, 1987 scheduled for 3.
tion 19 should replace Justification 1 for valves AL-e.
Justifica-
, 7, 9, 11.
4.
Please refer to Attachment B (Item II-B, pages 3 and 4) of th i
response.
for intentionally backseating a valve electrically?Where e latest
Enclosure Page 2 of 2 5.
Several entries in Table 2 of Attachment B to the Uni indicate that the actual closing force was greater than the calculated a
closing force (Log # 15, 91, 92, 105, 109, 110, 111).
Each of these used to predict closing force may have been unc 6.
At a meeting between NRC and Union Electric Co. on February 19 question of motor control center (MCC) testing of the motor operated
, 1987 the valves was discussed at some length.
" adjustment" of valve stem packing was discussed and several alt were mentioned.
testing per ASME Section XI after adjusting of packing a ves valve stem drag, as part of MCC testing, during refueling outages eck pointed out by the staff, such testing may not detect overtightening As packing during the interval between tests.
cussed this issue in their submittal.
Union Electric has not dis-made during the meeting was to limit packing loads to some prede value and to declare the valve inoperable if such a value were exceed However, the current Union Electric proposal involves no positive v cation that the valve was left operable after packing loads are adjus The ASME Section XI stroke timing test is considered inadequate ba past experience.
the needed assurance of valve operability after any adjus on ment of the valve assembly. stem packing or, for thct matter, any su valve
-1
.