ML19309G794
| ML19309G794 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 04/17/1980 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 8005070581 | |
| Download: ML19309G794 (1) | |
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PDR 8005070 7 21 LPDR TIC V UNITED STATES NSIC
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NUCLEAR REGULATORY COMMISSION CENTRAL FILES
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%, %J,5 April 17, 1980 In Reply Refer To:
RIV Docket Nos. 50-498/IE Bulletin No. 80-09 50-499/IE Bulletin No. 80-09 Houston Lighting & Power Company ATTN:
Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 Gentlemen:
The enclosed IE Bulletin 80-09 is forwarded to you for action. A written response is required. If you require additional information regarding this matter, please contact this office.
Sincerely,
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1 V. Seyfr Director
Enclosures:
1.
List of IE Bulletins Recently Issued
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1 SSINS No. 6820 UNITED STATES Accession No.:
NUCLEAR REGULATORY COMMISSION 8002280659 0FFICE OF INSPECTION AND ENFORCEMENT e
WASHINGTON, D.C.
20555 IE Bulletin No. 80-09 Date: April 17, 1980 Page 1 of 2 HYDRAMOTOR ACTUATOR DEFICIENCIES ITT General Controls (ITT-GC) reported to the NRC two (2) problem areas pertaining to their Models AH-90 and NH-90 Series Hydramotor Actuators.
The NH 90 designators depicts nuclear class 1E design.
Either of the problems reported could affect the operation of safety-related equipment installed in nuclear power facilities:
A.
On December 7, 1979, ITT-GC reported the use of springs having incorrect material installed in Models AH-90 and NH-90 Series Hydramotor Actuators.
Instead of 5160 steel, type 1060-1070 steel was used for the No. I springs in the actuators.
The incorrect spring material does not meet the design strength and upon actuation of greater than 3 inches stroke, a permanent set occurs resulting in a decreased force output of up to 160 lbs., depending on spring combinations used and specific adjustments made 1
to the actuators. About 368 defective springs were used between September 1975 and January 1978.
B.
On February 5, 1980, ITT-GC reported that the ITT-GC " Selection Nomograph" for AH-90 and NH-90 series hydramotor actuators represent the actual spring or hydraulic forces only and do not include the effects of friction or residual hydraulic forces.
It has been determined that the actuators can have about 100 lbs. of friction and an additional 40 lbs.
of residual hydraulic pressure.
Use of these nomographs may result in i
selection of actuators undersized for the use intended.
1 C.
Action to be taken by licensees and construction permit holders 1.
Each licensee and each holder of a construction permit should i
determine whether any safety-related system or component in the facility uses an AH-90 or NH-90 series Hydramotor Actuator manu-factured by ITT General Controls.
(Note: To assist in this deter-mination a listing of customers that have purchased said actuators and the number of actuators purchased is appended hereto as Attachment No. 1.
Since some of the Original Equipment Manufac-turers (OEM's) may delete the identity of components used in their product, it may be necessary to consult with the OEM to make the required determination.)
2.
Operating facilities using said actuators in safety-related systems should:
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IE Bulletin No. 80-09 Date: April 17, 1980 Page 2 of 2 a.
Review system functional testing to determine that equipment ucing the subject actuators are periodically tested.
b.
Examine test records to determine whether the functional test results conform to system requirements.
c.
Verify that ample margin exists with respect to thrust delivered to the load for long term operation considering improper spring material and methods used to select the actuator for a particular application.
d.
Take any corrective actions required by the results of items a.
- b. and c. above.
3.
Facilities with construction permits using said actuators in safety-related systems should:
i a.
Re-evaluate actuator size selection in light of the possibility of using actuators with defective springs or which were sized by the " Selection Nomograph" without accounting for internal friction and hydraulic resistance.
Said re-evaluation should assure that the actuators will perform their intended function.
b.
Modify equipment qualification, preoperational and startup test programs, as necessary, to demonstrate the functional adequacy of the Hydramotor Actuator in light of the aforementioned concerns.
Particular attention should be given to the possi-bility of defective springs taking a permanent set.
Note: ITT General Controls is presently performing actuator testing on units supplied by one of their customers (American Warming & Ventilating Co., Inc.) and revising the methods used to select actuator application.
Each licensee or holder of a construction permit should report to the NRC within 60 days of the results of actions taken, any corrective actions required, and the date when corrective actions were or will be completed.
The report should be addressed to:
U. S. Nuclear Regulatory Commission Director of Reactor Construction Inspection, 0.I.E.
Washington, D.C.
20555 A copy should alse be furnished to the Regional Office.
Approved by GAO, B180225 (R0072); clearance expires 7/31/80. Approval was given under a blanket clearance specifically for identified generic problems.
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Attachment No. 1 Customers Quantities ACDC Inc, Cincinnati, OH 27 American Warming & Ventilating Co., Inc.
Maumee, OH 145 Copes Vulcan, Inc.
Lake City, PA 2
Fisher Controls Co., Inc.
Marshalltown, IA 38 Fisher Controls Co., Inc.
Corapolis, PA 4
General Signal Corporation West Warwick, RI 2
ITT Hammel-Dahl Warwick, RI 4
Joy Manufacturing New Philadelphia, OH 18 Masoneilan International, Inc.
Norwood, MA 10 Pacific Air Products Santa Ana, CA 16 Posi Seal International, Inc.
No. Stonington, CT 14 Powers Regulator Co.
Portland, OR 1
Powers Regulator Co.
4 Skokie, IL 74 Ruskin Manufacturing Co.
Grandview,'MO 4
Valtek, Inc.
Springville, UT 9
TOTAL
- 368,
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IE Bulletin No. 80-09 April 17, 1980 RECENTLY ISSUED IE BULLETINS Bulletin Subject Date Issued Issued To No.79-01B Environmental Qualification 2/29/80 All power reactor of Class IE Equipment facilities with an Operating License (OL) 80-05 Vacuum Condition Resulting 3/10/80 All PWR power reactor In Damage To Chemical facilities holding Volume Control System Operating Licenses (OLs)
(CVCS) Holdup Tanks and to those with a Construction Permit (CP) 30-06 Engineered Safety Feature 3/13/80 All power reactor facilities (ESF) Reset Controls with an Operating Licence (OL)79-03A Longitudinal Weld Defects 4/4/80 All power reactor facilities In ASME SA-312 Type 304 with an Operating License Stainless Steel Pipe (OL) or Construction Permit (CP) 80-07 BWR Jet Pump Assembly 4/4/80 All GE BWR-3 and BWR-4 Failure facilities with an Operating License (OL) 80-08 Examination of Containment 4/7/80 All power reactors with a Liner Penetration Welds Construction Permit and/or Operating License (OL) no later than 4/7/80 Enclosure i
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