ML20116D320
| ML20116D320 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway, 05000000 |
| Issue date: | 04/22/1985 |
| From: | Hill T RUSKIN MANUFACTURING CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-PT21-85-230-000 PT21-85-230, PT21-85-230-000, NUDOCS 8504290377 | |
| Download: ML20116D320 (5) | |
Text
,
andv ew, Missouri 64030 Phone 816 7617476 Division of Philips industries Inc.
TELEX 42 4192 Factories: Parsons and Great Bend. Kansas; Anaheim, California; Minden, Louisiana; and Bronx, New York Representatives in all Major Cities April 22, 1985 Director, Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
10555 Sir:
In accordance with the requirements of 10 CFR part 21, Ruskin Manufacturing Company, located at 3900 Dr. Greaves Road, Grandview, Missouri 64030, is herewith providing our written reports, as follow up to initial notification provided by telecon, R. Yarges (Ruskin Manufacturing Division) to J. Petrosino (NRC).
On April 16, 1985, during a Ruskin inspection at the Wolf Creek jobsite, it was discovered that the welds used to join damper section to damper section and damper section to mullion plates were not in accordance with approved design drawings, Ruskin drawing 5415.
Subsequent to the discovery of the above weld problem, a meeting was conducted at Underwriters Laboratories (UL) to verify that the condition present at Wolf Creek would not affect the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating of the dampers.
UL provided assurances (letter attached) that the dampers which were welded 1" on 9" centers in lieu of 1" on 6" centers would be acceptable.
Ruskin has revised drawing 5415 to indicate present weld spacing at Wolf Creek and will transmit this date.
(Copy enclosed)
Additionally, since the purchase order for these dampers was for Callaway Nuclear site, as well as Wolf Creek, drawings will also be revised to include Callaway.
Ruskin feels that since these dampers were fabricated and shipped prior to the availability of a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> label, subsequently inspected by Ruskin and UL, and l
labeled at the jobsite, that this condition is isolated to this contract only. No other project received dampers prior to Ruskin obtaining approval for 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> horizontal dampers.
Ruskin will forward notification to Bechtel indicating acceptance of the dampers at the SNUPPS project (Wolf Creek and Callaway).
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PDR LOUVERS BACKDRAFT DAMPERS FIRE DAMPERS CONTROL DAMPERS o TITUS DIVISION
- RUSPuN DivlSION MANU9CTURED HOa NGMCAEAflON AL VEHICLE GROUP L ASCo DMSION
- LAU DIVISION
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pr Director, Office Of Inspection and Enforcement U. S. Nuclear Regulatory Commission
-April 22, 1985-Page 2 If further questions should arise, please contact us at once.
Sincerely, RUSKIN NUFACTURING DIVISION 0
Thomas D. Hill President cc:
File
Enclosures:
Underwriters Laboratories Letter Ruskin Drawing 5415 NOTE:
For further discussions, questions, or concerns on this matter, please contact:
Richard J. Yarges Ruskin Manufacturing Division (816) 761-7476
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an independent, not-for-prof t organization testingfor public safety April 19, 1985 Ruskin Manufacturing Div. of Philips Industrial Components Inc.
Mr. Darrell A. Yelton Box 129 Grandview, MO 64030
Dear Mr. Yelton:
This confirms our April 18, 1985 meeting regarding 3 hr fire damper installations in the Wolf Creek and Calloway Nuclear Generating Stations (SNUPPS Projectl.
We understand that horizontal mount multiple assembly fire dampers were assembled using a 9 in. center spacing of the damper to damper and mullion joints, in lieu of the 6 in.
spacing required by the installation instructions for the labeled damper.
You indicated the maximum size of dampers involved were 49-3/8 in, by 34-1/2 in. (2 sections of 25 in.
width by 34-1/2 in. heightl and 35-1/2 in. by 50-1/4 in.
(4 sections of 17 in. width by 25 in. heightl.
As discussed in our meeting, a six section horizontal mount l
multiple assembly approximately 90 in width by 106-1/2 in.
l height (with individual sections of 45 by 35-1/2 in.) was l
subjected to a 3 hr fire endurance and hose stream test per letter Report R5531-5/78NK10759 dated June 18, 1980.
The multiple assembly used 9 in. center spacing of welds along l
the damper to damper joints and 8 in. center spacing of l
welds along the mullion joints.
During this test, it was observed that the damper to damper joints and mullion joints performed satisfactorily throughout the entire test without l
l developing visible through openings.
The openir.gs of the blade packages observed in this test were judged to be a result of failure of the blade ramps, and not directly related to the weld spacing along the damper to damper to mullion joints.
Accordingly, based on the test date in Report R5531-5, it is judged that the 9 in. spacing of fasteners for the damper to damper and mullion joints in the SNUPPS Project fire damper installations referenced above will not adversely affect the perforraance of the fire dampers.
i Look For The @ Listing or Classification Mark On The Product L
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-UNDEftNRITERS LABORATORIES INC; Page 2 April 19, 1985 Additionally, we would like to advise you that Follow-Up Service Procedures R5531 are being revised to indicate total blade to frame clearances of 1/S in. minimum to 7/16 in.
maximum for galvanized steel constructions and 3/16 in. minimum to 7/16 in. maximum for stainless steel constructions.
Please contact us if you require additional information.
Very truly yours,
'o%E. W '
M. R. FRANTTI Senior Project Engineer Fire Protection Department Reviewed by:
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DONAH Assistant Managing Engineer Fire Protection Department JRF:js l
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