ML20210C295

Forwards Request for Addl Info Re Util 870305 Revised Response to IE Bulletin 85-003, Motor-Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings. Comments on Revised Response Also Encl

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 l

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Enclosure Page 1 of 2 REQUEST FOR ADDITIONAL INFORMATION (RAI) RE:

REVIEW OF RESPONSES TO ACTION ITEM E OF IE Licensee:

Union Electric Company Unit: Callaway 1 1901 Gratiot Street Date of Response: 03/05/87 St. Louis, Missouri (Response to Initial Respondent: RAI)

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 Bulle information requested by the following comments and questions:Please 1.

Referring to Enclosure 1 (Page 1)03/05/87, response to RAI Question 1: of the of the note latest "Due to the results of this (MOVATS') resear;h

, we have revised our submittal to no longer require one time AP testing in the on."

open di that the MOVATS data base does note 1,include less than 1.75 or greater than 2.0 inches.

note glo orifice sizes We note that four 4-inch motor operated globe valves , 7, 9 &

(HV 5

11) are located in discharge lines of the AFW motor-driven , and that pumps 1-1/2-inch motor operated globe valves (HV-8813 &two HV-88148) a miniflow lines leading from the HHSI pumps to the RWST .

re located in Will open representative direction? samples of these globe valves be delta P t ested in the 2.

Please refer to Enclosure 2 (Page 3) of the latest response Completion of revision of procedures for Phase II This date does not agree with the date of March 15 is scheduled.

for July 1

, 1987.

Phase II on Page 6 of Enclosure 2. , 1987 scheduled for  !

3.  !

4.

tion 19 should replace Justification e.1 Justifica-for valves AL-

, 7, 9, 11.

Please response. refer to Attachment B (Item II-B, pages 3 and 4) of th e latest i

for intentionally backseating a valve electrically?Where i

Enclosure Page 2 of 2 5.

Several entries in Table 2 of Attachment B tocalculated indicate closing that force (Logthe# actual closing force was greater than the the Uni a

15, 91, 92, 105, 109, 110, 111). Each of these 6.

used to predict closing force may have been unc .

At a meeting between NRC and Union Electric Co. on, February 1987 the 19 question of motor control center valves was discussed at some length. (MCC) testing of the motor operated

" adjustment" were mentioned. of valve stem packing was discussed andvesseveral alt testing per ASME Section XI after adjusting of packing a eck valve stem drag, as part of MCC testing, during refuelingAsoutages pointedduring out bythe the staff, suchtests.

testing may not detect overtightening packing interval between 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 Theexperience.

past ASME Section XI stroke timing test is considered inadequate on ba the needed assurance of valve operability after valve any adjus ment of the valve assembly. stem packing or, for thct matter, any su l

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