ML20215K516

Forwards Request for Addl Info Re IE Bulletin 85-003, Motor-Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings. Response Requested within 1 Month of Ltr Receipt

ML20215K516
Person / Time
Site:	Callaway
Issue date:	05/07/1987
From:	Norelius C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Schnell D UNION ELECTRIC CO.
References
IEB-85-003, IEB-85-3, NUDOCS 8705110236
Download: ML20215K516 (4)

Text

_;

h i

i MAY 0 71987 l

l Docket No. 50-483 l Union Electric Company l

ATTN: Mr. Donald F. Schnell Vice President - Nuclear '

Post Office Box 149-Mail Code 400 St. Louis, M0 63166 Gentlemen:

The preliminary review of your March 5,1987, revised response to IE Bulletin 85-03 " Motor-0perated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings" indicates the need for additional information before the program to assure valve operability can be approved.

The specific information necessary for the completion of our review is enclosed.

Additional information is requested within one month of receipt of this letter.

The written report shall be submitted to the Regional Administrator, Region III, under oath or affirmation under provisions of Section 182a, Atomic Energy Act of 1954, as amended. Also, the original copy of the cover letter and a copy of the report shall be transmitted to the U.S. Nuclear Regulatory Commission Document Control Desk, Washington, DC 20555 for reproduction and distribution.

t uestions addressing this issue may be forwarded to Richard J. Kiessel, NRR 301)492-9605.

Sincerely, Charles E. Norelius, Director Division of Reactor Projects

Enclosure:

Request for Additional Information See Attached Distribution C{gggg

/

l '3 15poU 30@

l 'It s [D Rll!  !!! Rlli RI!! RI ,

Landsman /bs Forney Warnick us -'

W9hld 4l1k.'/4 7 dIY 111 1 R):D) (T 1

ggtBaaBISTg 56 P -

htAY 0 71987 Union Electric Company Distribution A. P. Neuhalfen, Manager Quality Assurance Gary L. Randolph, General Manager, Nuclear Operations DCS/RSB(RIDS)

Licensing Fee Management Branch Resident Inspector, RIII Region IV Wolf Creek Resident Inspector K. Drey Chris R. Rogers, P.E.

Utility Division, Missouri Public Service Commission SNUPPS j Richard J. Kiessel, NRR 4

f

_y , .-- _ ,,-, _ _ _ _ . - _ -, _ _ , - _ _ . . . .

e Enclosure 9

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

REVIEW OF RESPONSES TO ACTION ITEM E OF IE BULLETIN 85-03 Licensee: Unit: Callaway 1 Union Electric Company Date of Response: 03/05/87 1901 Gratiot Street (Response St. Louis, Missouri to Initial RAI)

Respondent:

Donald F. Schnell Vice President, Nuclear The information provided in your responses to Action Item e of IE Bulletin 85-03 was found to be deficient in some areas. Please provide the additional information requested by the following comments and questions:

1. Referring to Enclosure 1 (Page 1) of the latest response of 03/05/87, note that the following statement appears in the second paragraph of the response to RAI Question 1:

"Due to the results of this (MOVATS') research, we have revised our submittal to no longer require one time AP testing in the open direction."

Referring to the response to RAI Question 6 on Page 5 of Enclosure 1, note that the M0 VATS data base does not include globe valves with orifice sizes less than 1.75 or greater than 2.0 inches.

We note that four 4-inch motor-operated globe valves (HV-5, 7, 9 & 11) are located in discharge lines of the AFW motor-driven pumps, and that two 1-1/2-inch motor-operated globe valves (HV-8813 & HV-8814B) are located in miniflow lines leading from the HHSI pumps to the RWST. ,

Will representative samples of these globe valves be delta-P tested in the open direction?

2. Please refer to Enclosure 2 (Page 3) of the latest response. Completion of revision of procedures for Phase II is scheduled for July 1, 1987.

This date does not agree with the date of March 15, 1987 scheduled for Phase II on Page 6 of Enclosure 2.

3. Please refer to Attachment A (Page 2) of the latest response. Justifica-tion 19 should replace Justification 1 for valves AL-HV-5, 7, 9, 11. )

4. Please refer to Attachment B (Item II-B, pages 3 and 4) of the latest response. Where in the response are conditions and precautions addressed for intentionally backseating a valve electrically?

, 0 1

Enclosure Page 2 of 2 5.

Several entries in Table 2 of Attachment B to the Union Electric submittal indicate that the actual closing force was greater than the calculated closing force (Log # 15, 91, 92, 105, 109, 110, 111). Each of these should be explained in detail since the figures indicate that the formula used to predict closing force may have been unconservative in these cases.

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

" adjustment" of valve stem packing was discussed and several alternatives were mentioned. Union Electric's current proposal is to do stroke time -

testing per ASME Section XI after adjusting of packing and then to check valve stem drag, as part of MCC testing, during refueling outages. As pointed out by the staff, such testing may not detect overtightening of packing during the interval between tests. Union Electric has not dis-cussed this issue in their submittal. One of the Union Electric proposals made during the meeting was to limit packing loads to some predetermined value and to declare the valve inoperable if such a value were exceeded.

However, the current Union Electric proposal involves no positive verifi--

cation that the valve was left operable after packing loads are adjusted.

The ASME Section XI stroke timing test is considered inadequate based on past experinnce. The Union Electric policy should be revised to provide the needed assurance of valve operability after any adjustment of valve stem packing or, for that matter, any substantial maintenance or adjust-ment of the valve assembly.