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pr[$f Gentlemen:
j The enclosed Information Notice 81-35, " Check Valve Fail.acs",
N' e to you for information.
No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, yk-
)Ro aid C. Hayn C ~ ~ '_.
Regional Administrator
Enclosure:
IE Information Notice No. 81-35 with 1 Attachment CONTACT:
L. H. Bettenhausen (215) 337-5291 k
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i LIST OF HOLDERS OF NUCLEAR POWER REACTOR OPERATING LICENSES AND CONSTRUCTION PERMITS RECEIVING IE INFORMATION NOTICE NO. 81-35 Baltimore Gas and Electric Company Docket Nos. 50-317 ATTN: Mr. A. E. Lundvall, Jr.
50-318 Vice President, Supply P. O. Box 1475 Baltimore, Maryland 21203 Boston Edison Company M/C Nuclear Docket No. 50-293 ATTN: Mr. A. V. Morisi Nuclear Operations Support Manager 800 Boylstor Street Boston, Massachusetts 02199 Connecticut Yankee Atomic Power Company Docket No. 50-213 ATTN:
Mr. W. G. Counsil Vice President - Nuclear Engineering and Operations P. O. Box 270 Hartford, Connecticut 06101 Consolidated Edison Company of Docket Nos. 50-03 New York, Inc.
50-247 ATTN:
Mr. John D. O'Toole Vice President - Nuclear Engineering and Quality Assurance 4 Irving Place New York, New York 10003 Duquesne Light Company Docket No. 50-334 ATTN:
Mr. J. J. Carey Vice President Nuclear Division P. O. Box 4 Shippingport, Pennsylvania 15077 Jersey Central Power and Light Company Docket No. 50-219 ATTN: Mr. Philip R. Clark Vice President - Nuclear GPU Nuclear 100 Interpace Parkway Parsippany, New Jersey 07054
2 Maine Yankee Atomic Power Company Docket No. 50-309 ATTN: Mr. Robert H. Groce Senior Engineer-Licensing 1671 Worcester Road Framingham, Massachusetts 01701 Metropolitan Edison Company Docket No. 50-289 ATTN: Mr. H. D. Hukill
.Vice President and Director of TMI-l P. O. Box 480 Middletown, Pennsylvania 17057 Metropolitan Edison Company Docket No. 50-320 ATTN: Mr. J. J. Barton Acting Vice President and Director of TMI-2' P. O. Box 480 Middletown, Pennsylvania 17057 Niagara Mohawk Power Corporation Dociet No. 50-220 ATTN: Mr. T. E. Lempges Vice President Nuclear Generation 1
300 Erie Boulevard West i
Syracuse, New York 13202 j
Northeast Nuclear Energy Company Docket Nos. 50-336 ATTN:
Mr. W. G. Counsil 50-245 l-Senior Vice President - Nuclear 50-423 i
Engineering and Operations Group
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P. O. Box 270 Hartford, Connecticut 06101 1
i Philadelphia Electric Company Docket Nos. 50-277 i
ATTN: Mr. S. L. Daltroff 50-278 Vice President Electric Production f
2301 Market Street
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Philadelphia, Pennsylvania 19101 Power Authority of the State of New York Docket No. 50-286 Indian Point 3 Nuclear Power Plant ATTN: Mr. J. C. Brons
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Resident Manager P. O. Box 215 Buchanan, New York 10511
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3 Power Authority of the State of New York Docket No. 50-333 James A. FitzPatrick Nuclear Power Plant ATTN: Mr. John D. Leonard Resident Manager P. O. Box 41 Lycoming, New York 13093 Public Service Electric and Gas Company Docket Nos. 50-272 ATTN: Mr. F. W. Schneider 50-311 Vice President - Production 80 Park Plaza - 15A Newark, New Jersey 07101 Rochester Gas and Electric Corporation Docket No. 50-244 ATTN: Mr. John E. Maier Vice President Electric and Steam Production 89 East Avenue Rochester, New York 14649 Vermont Yankee Nuclear Power Corporation Docket No. 50-271 ATTN: Mr. Ro'oert L. Smith Licensing Engineer 1671 Worcester Road Framingham, Massachusetts 01701 Yankee Atomic Electric Company Docket No. 50-29 ATTN:
Mr. James A. Kay Senior Engineer-Licensing 1671 Worcester Road Framingham, Massachusetts 01701 Duquesne Light Company Docket No. 50-412 ATTN:
Mr. E. J. Woolever Vice President t
435 Sixth Avenue Pittsburgh, Pennsylvania 15219 Jersey Central Power & Light Company Docket No. 50-363 ATTN:
Mr. J. T. Carroll Acting Director Oyster Creek Nuclear Generating Station P. O. Box 388 Forked River, New Jersey 08731 Long Island Lighting Company Docket No. 50-322 ATTN: Mr. M. S. Pollock Vice President - Nuclear 175 East Old Country Road Hicksville, New York 11801
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Niagara Mohawk Power Corporation Docket No. 50-410 ATTN:
Mr. Gerald K. Rhode Vice President System Project Management c/o Miss Catherine R. Seibert 300 Erie Boulevard, West Syracuse, NY 13202 Pennsylvania Power & Light Company Docket Nos. 50-387 ATTN: Mr. Norman W. Curtis 50-388 Vice President Engineering and Construction - Nuclear 2 North Ninth Street Allentown, Pennsylvania 18101 Philadelphia Electric Company Docket Nos. 50-352 l
ATTN:
Mr. John S. Kemper 50-353 Vice President Engineering and Research 2301 Market Street Philadelphia, Pennsylvania 19101 Public Service Electric & Gas Company Docket Nos. 50-354 ATTN:
Mr. T. J. Martin 50-355 Vice President i
Engineering and Construction 80 Park Plaza - 17C Newark, New Jersey 07101 1
Public Service Company of New Hampshire Docket Nos. 50-443 ATTN:
Mr. W. C. Tallman 50-444 Chairman and Chief Executive Officer 1000 Elm Street Manchester, New Hampshire 03105 t
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SSINS No.:
6835 Accession No.:
8107230041 IN 81-35 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECT 1DN AND ENFORCEMENT WASHINGTON, D.C.
20555 December 2, 1981 IE INFORMATION NOTICE NO. 81-35:
CHECK VALVE FAILURES Description of Circumstances:
After undertaking a program at Three Mile Island Nuclear Station Unit 1 (TMI-1) to follow the reccmmendations in IE Circular 78-15, " Tilting Disk check Valves Fail to Close With Gravity in Vertical Position," Metropolitan Edison Company (Met-Ed) reported (LER 80-003/01T and supplement) loose valve internals in the high pressure injection pump discharge check valves.
The valves are Crane three-inch 1500# tilting disk check valves.
The initial cause of the loose valve internals was traced to the corrosion of the seat holddown devices of the valves.
As a result of these findings, Met-Ed developed and implemented a continuing inspection program for TMI-1.
A design study of the tilting disk check valves was also conducted.
Further inspection led to the discovery that some valves could not prevent back flow due to the failure of the hinge pin and seat ring retention devices.
A hinge pin was found to have fallen off, and tack welds on the hinge pin retaining screws were either cracked, weak, or nonexistent.
In the seat ring retention device, one lock plate assembly was missing and the seat ring retention device became loose because washers were not installed.
Met-Ed also found many fabrication inconsistencies that may have initiated and/
or contributed to these failures.
These inconsistencies ranged frcm the use of materials, other than those specified in procurement documents, to poor workman-ship, particularly in the case of welds.
For instance, where tack welds were called for on the hinge pin retaining screws, the screws were peened.
There were also instances where flat washers were installed in the valves instead of spring washers, and nickel plated carbon steel washers were used when precipi-tation hardened stainless steel washers were specified.
Additional problems with disk retaining pins in Crane check valves were reported by Florida Power Company (LERs 80-017/03L-0 and 80-021/03L-0) at Crystal River Unit 3 and by Virginia Electric and Power Company (LER S0-023/01T-0) at Surry Unit 1.
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IN 81-35 December 2, 1981 Page 2 of 2 The failure of the hinge lugs on a Mission Manufacturing Company check valve at Fort Calhoun Station was reported by Omaha Public Power District (LER 78-036/
03 L-0). The failure of the hinge lugs allowed the disk plate to migrate to the steam generatar.
No damage was observed in the steam generator when the disk plate was removed.
The valve is a Mission Type 3"-C308, Style "B" Duo Check, Series 900 check valve.
The discovery of internal damage to two Anchor Darling check valves at Arkansas Nuclear One Unit 2 was reported by Arkansas Power and Light Company (LER 81-034/
99X-0). When the first valve was opened to repair a leak, it was discovered that the disk pin was broken from the disk and the disk pin, pin nut, and washer were missing.
The equivalent valve in the redundant train was then opened and a disk pin nut and washer were found missing.
Both failures were attributed to the valve being manufactured with wire usnd as the locking device rather than the pin shown on the design drawing.
Both valves are Anchor Darling four-inch swing check valves, drawing number 3102-3.
Thus, the check valve failures can be attributed to two main causes: (1) poor retaining device design, and (2) poor quality control on the assembly of the valve internals.
Similar problems with check valves from another manufacturer are described in IE Information Notices No. 80-41, " Failure of Swing Check Valve in the Decay Heat Removal System at Davis-Besse Unit No. 1," and 81-30, "Velan Swing Check Valves."
This information is provided as notification of a potentially significant matter.
It is expected that recipients will review the information for possible applicability to their facilities.
No specific action or response is requested at this time.
If you have questions regarding this matter, please contact the Regional Administrator of the appropriate NRC Regional Office.
Attachment:
Recently issued IE Information Notices I
Attachment IN 81-35 December 2, 1981 RECENTLY ISSUED IE INFORMATION NOTICES Information Subject Date Issued to Notice No.
Issued 81-34 Accidental Ar
. tion 11/16/81 All holders of a of Public Nc lication power reactor System OL or CP 81-33 Lockino r ices 11/9/81 All holders of a Inade _ t<ly Installed power reactor s
on Main Steam Isolation OL or CP Valves 81-32 Transfer and/or 10/23/81 All holders of Disposal of Spent material licenses Generators as designated by IE 81-31 Failure of Safety 10/8/81 All holders of a Injection Valves to power reactor Operate Against OL or CP Differential Pressure El-30 Velan Swing 9/28/81 All holders of a Check Valves power reactor OL or CP 81-29 Equipment Qualification 9/24/81 All holders of a Testing Experience power reactor OL or CP 81-28 Failure of Rockwell-9/3/81 All holders of a Edward Main Steam power reactor Isolation Valves OL or CP 81-27 Flammable Gas Mixtures 9/3/81 All holders of a in the Waste Gas Decay power reactor Tanks in PWR Plants OL or CP 81-26 Compilation of Health 8/28/81 All holders of a power Physics Related reactor OL or CP, Information Items Research Reactor, Fuel Facilities and Priority Material License 81-25 Open Equalizing Valve 8/24/81 All holders of a of Differential Pressure power reactor Transmitted Causes OL or CP Reactor Scram and Loss of Redundant Safety Signals
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