ML20078J331

Final Deficiency Rept Re Underrated Terminal Strips on Limitorque Valve Operators.Initially Reported on 810213.New Valve Operators for Use Inside Containment Will Be Purchased W/O Terminal Blocks or Space Heaters

ML20078J331
Person / Time
Site:	Midland
Issue date:	10/06/1983
From:	Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 23813, 81-01-#13, 81-1-#13, MCAR-46, NUDOCS 8310170421
Download: ML20078J331 (25)

Text

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POW 8r u, w w O CODSumBIS &

General Offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 788 0453 Vice President - Projects, Engineering and Construction October 6, 1983 81-01 #13 Mr J G Keppler, Regional Administrator US Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND NUCLEAR C0 GENERATION PLANT DOCKET NOS 50-329 AND 50-330 UNDERRATED TERMINAL STRIPS ON LIMITORQUE VALVE OPERATORS FILE: 0.4.9.47 SERIAL: 23813

References:

J W Cook letters to J G Keppler, same subject:

1) Serial 11190, dated February 13, 1981

2) Serial 11976, dated April 24, 1981

3) Serial 12041, dated July 8, 1981

4) Serial 13665, dated September 11, 1981

5) Serial 14617, dated November 20, 1981

6) Serial 14690, dated February 12, 1982

7) Serial 17503, dated June 4, 1982

8) Serial 17565, dated August 6, 1982

9) Serial 19070, dated October 22, 1982

10) Serial 20680, dated January 30, 1983

11) Serial 20729, dated March 16, 1983

12) Serial 22219, dated June 7, 1983 This letter is a final 10CFR50.55(e) report concerning terminal strips on Limitorque valve operators. Attachment i describes corrective action taken to resolve these problems.

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OC0983-0041A-MP01 I I L

2 81-01 #13 Serial 23813 Since the last interim report, Consumers Power Company has notified your staff of an additional concern involving terminal block mounting brackets that had not been seismically qualified. During the telephone conversation, Consumers Power Company stated that the use of these brackets resulted from a need for auxiliary terminal blocks that appeared to be unique to Midland. Further investigation has not been able to confirm this statement; the use of unqualified mounting brackets may not be limited to the Midland project.

Midland project resolution has been as described in Attachment 1.

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[ s JWC/WRB/cd Attachment 1: MCAR 46, Final Report, " Qualification Concerns for Various Components on Limitorque Valve Operators,"

dated September 16, 1983.

CC: R J Cook, NRC, Midland D S Hood, US NRC Document Control Desk, NRC INPO Records Center OC0983-0041A-MP01

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81-01 #13 Serial 23813 OM/0L SERVICE LIST Mr Frank J Kelley Atomic Safety & Licensing Attorney General of the Appeal Board State of Michigan U S Nuclear Regulatory Commission Ms Carole Steinberg, Esq Washington, DC 20555 Assistant Attorney General Environmental Protection Division Mr C R Stephens (3) 720 Law Building Chief, Docketing & Services Lansing, MI 48913 U S Nuclear Regulatory Commission Office of the Secretary Washington, DC 20555 Mr Myron M Cherry, Esq Suite 3700 Ms Mary Sinclair Three First National Plaza 5711 Summerset Street Chicago, IL 60602 Midland, MI 48640 Mr Wendell H Marshall Mr William D Paton, Esq RFD 10 Counsel for the NRC Staff Midland, MI 48640 U S Nuclear Regulatory Commission Washington, DC 20555 Mr Charles Bechhoefer, Esq Atomic Safety & Licensing Atomic Safety & Licensing Board Panel Board Panel U S Nuclear Regulatory Commission U S Nuclear Regulatory Commission Washington, DC 20555 Washington, DC 20555 Dr Frederick P Cowan Ms Barbara Stamiris 6152 N Verde Trail 5795 North kiver Road Apt B-125 Rt 3 Boca Raton, FL 33433 Freeland, MI 48623 Mr Fred C Williams Mr Jerry Harbour Isham, Lincoln & Beale Atomic Safety & Licensing 1120 Connecticut Ave, NW, Suite 325 Board Panel Washington, DC 20036 U S Nuclear Regulatory Commission Washington, DC 20555 Mr James E Brunner, Esq Mr M I Miller, Esq Consumers Power Company Isham, Lincoln & Beale

, 212 West Michigan Avenue Three First National Plaza Jackson, MI 49201 52nd Floor Chicago, IL 60602 Mr D F Judd Mr John Demeester, Esq

! Babcock & Wilcox Dow Chemical Building PO Box 1260 Michigan Division Lynchburg, VA 24505 Midland, MI 48640 Mr Steve Gadler, Esq Ms Lynne Bernebei 2120 Carter Avenue Government Accountability Project St Faul, MN 55108 1901 Q Street, NW Washington, DC 20009 September 6, 1983

( OC0983-0041A-MP01 l

Attachment 1

• • Serial 23813

" ' 81-01 #13 Bechtel Associates Professional Corporation 128708 i2863i l

SUBJECT:

MCAR 46 (issued 1/15/81)

Qualification Concerns for Various Components on Limitorque Valve Operators FINAL REPORT DATg: September 16, 1983 i PROJECT: Consumers Power Company Midland Plant Units 1 and 2 Bechtel Job 7220 Introduction Enviror: mental- and nonenvironmental-related deficiencies have been separated into two groups for clarity from previous reports; thus, the report has been rewritten in its entirety. The safety evaluation performed to determine the safety con:ern due to the existence of seismically unqualified L-brackets used for mounting terminal blocks is also discussed in this report.

Description of Deficiency The following deficiencies are covered by MCAR 46.

1. Nonenvironmental l

a. Use of Underrated Terminal Blocks in Limitorque Operators While replacing a damaged terminal block on a Limitorque operator, Bechtel determined that some of the terminal blocks used for the termination of the leads from the 460 V motor were rated less than 460 V. These Limitorque operators, when l

used on safety-related valves, must function on an emergency l core cooling actuation signal (ECCAS). In addition to being a personnel safety hazard, the potential exists for a short circuit /flashover, which could render the valves inoperative.

b. Use of Unqualified Space Heaters for Class 1E Systems Space heaters are required for nontemperature-controlled environments according to Limitorque; however, the supplied space heaters were not qualified for use in Class II equipment.

c. A generic corrective action report identified four operators with L-brackets for mounting terminal blocks that were not seismically qualified. Failure of the L-bracket in a safety-related valve operator during an earthquake could cause an electrical short circuit, which could render the valve inoperable.

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2. Environmental i 1) Terminal block qualification tests do not envelope Midland's inside-containment parameters. In addition, some terminal block types used in outside-containment units were not included in the terminal block qualification tests performed by Limitorque.

2) Some ac motor operators on inside-containment units have not i been tested for inside-containment conditions. These units have motors with Class B insulation and actuators with limit switch, gear frame, and cover materials not recommended for use inside containment. ,

3) Qualification of de motors for their service environments has not yet been established.

4) Drain plug positions vary among units and are not in accordance with the configuration tested in the Limitorque qualification tests.

5) Some units have terminal blocks or control circuit jumper wires that cannot be identified as the types tested by Limitorque.

Sussnary of Investiaation and Historical Backaround

1. Nonenvironmental

a. Underrated Terminal Blocks

1) The manufacturer's name was the only form of identification found on a damaged terminal block. To order a replacement for the damaged terminal block, it was therefore necessary to measure the block's critical dimensions and compare them with those for blocks listed in Marathon Catalog 10M79. This comparison indicated that the terminal blocks used for the termination of the leads from the 460 V motor could have been rated less than 460 V. Eighteen Limitorque operators on Bechtel rucchase Order (P.O.) 7220-N-132-AC were inspected, and eight were 0458u

Bechtel Associates Professional Corporation ac*a 46 128706 ZSh.3,l Final Report Page 3 found to have underrated terminal blocks (Marathon 100 Series and Cinch Jones 140 series). Bechtel determined that some terminal blocks in Limitorque valte operators may be underrated for their intended function. The other ten operators inspected had Marathon 300 Series terminal blocks that are correctly rated for the intended service.

Purchase Order 7220-N-132 is with Henry Pratt Corpany for the supply of cuclear service butterfly valves.

2) Representatives from Limitorque and Henry Pratt visited the Midland jobsite on January 31, 1981. After inspecting the termical blocks, they confirmed the results of Bechtel's investigation.

3) Vendors supplying Limitorque operators for the Midland project were reminded of their legal and contractual obligation under 10 CFR 21 in March 1981 to report nonconforming conditions that could affect th? safe operation of their product (closes Recossended Action Item 5, MCAR 46, Rev 2).

4) Bechtel identified eleven purchase orders with seven

! diff rent vendors covering all Q-listed, safety-ralated Limitorque operators. Based on this list, Bechtel developed a random inspection plan. Random inspection was performed by Limitorque during the week of May 11, 1981, to establish the magnitude of the presence of the underrated terminal blocks in the Limitorque operators.

After review of the inspection reports submitted by

• Limitorque, Bechtel determined that underrated terminal blocks wery not used on any Q-listed purchase orders except P.O. 7220-M-132(Q) (closes Recommended Action Item 1 MCAR 46, Rev 2).

5) seven different types of terminal blocks were identified (Buchanan 0222, 0524, and 0824; Marathon 300 Series; Beau 7500; Kulka 622; and General Electric RB-5) during the random inspection referred to in Item 4 above. All seven types are acceptable for 460 Y service.

6) The following 18 new Limitorqua operators were identified under open purchase order items for valves with Limitorque operators. Rach operator was inspected at the jobsite upon receipt from the vendor for verification of the 0458u

Bechtel Associates Professional Corporation "C"

128708 gggy}FinalReport Page 4 acceptable type of terminal block (closes Recommended Action Item 4. MCAR 46, Rev 2).

P.O. Number Item (Ouantity) Terminal Block (TB) 7220-J-255A(Q) 23(8) TB Kulka 622 7220-N-117(Q) 5.1(1) TB Marathon 300 7220-N-117(Q) 5.2(1) TB Marathon 300 7220-M-117(Q) 5.3(1) TB Marathon 300 7220-N-117(Q) 5.4(1) TB Marathon 300 7220-N-168(Q) 1.5(1) TB Buchanan 0222 7220-N-398(Q) 1.1(1) TB Kulka 622 7220-N-398(Q) 1.2(1)* TB Kulka 622 7220-M-398(Q) 3.1(1)* TB Kulka 622 7220-N-398(Q) 3.2(1)* TB Kulka 622 7220-N-398(Q) 3.3(1) TB Kulka 622 a) All operators listed above are located outside containment and in mild environments except those identified by an asterisk, which are located in harsh environments.

b) The terminal blocks' voltage ratings are acceptable.

Marathon 300 and Buchanan 0222 terminal blocks are environmentally qualified for harsh envircament location, while the Kulka 622 terminal block is acceptable for mild environment location only.

7) Replacement of all underrated terminal blocks (Marathen 100 series and Cinch Jones 140 series) on Purchase Order 7220-N-132(Q) was undertaken by Bechte3 under the supervision of Limitorque service engineering during the second week of June 1982. The replacement work is now complete; all 71 operators on P.O. 7220-N-132fQ) have been inspected (closes Recommended Action Item 3, ICAR 46 Rev 2).

8) Bechtel has received the inspection / replacement report from Limitorque for the work described in Item 1.a.7 above.

9) Limitorque's letter dated June 25, 1981 (Ref: NCAR 46 Interim Report 4, Item A.1), states that terminal block types Buchanan 0524 and Peau 7600 were previously rated 0458u

Bechtel Associates Professional Corporation NCAR 46 12 8 6 3einal neport l28[Q$

Page 5 for 600 V service using the breakdown voltage method of rating. A concern was raised because no documents were gvailable at Bechtel to support this statement.

Limitorque has now provided additional documentation showing that the terminal blocks in question were previously rated at 750 V and 600 V, respectively.

b. Unqualified Space Heaters During a meeting held in Lynchburg, Virginia on July 17, 1981, Limitorque stated that space heaters are not considered to be Class 1E egtipment. Currently, space heaters are wired into safety-related, Class IE circuitry. Because they are not qualified for class 1E service, they are postulated to fail.

Bechtel requested Limitorque's resolution in its letter dated July 25, 1983.

To resolve the problem of unqualified space heaters in Class 1E circuits, Limitorque suggested in a August 23, 1983, letter that the space heaters be deleted (disconnected from the circuitry) and that periodic inspection for condensation damage be performed for those operators located in an uncontrolled temperature area (resolves Item B.8 of additional j deficiencies, NCAR 46, Rev 2).

c. L-Brackets Corrective Action Report (CAR) 102-E-022 identified that the terminal block mounting brackets (L-brackets) on Limitorque operators 1NO-1210A and B and 2NO-1310A and B may not have been selpmically qualified. Because of insufficient room to directly mount an auxiliary terminal block within the actuator, L-shaped sheet metal brackets were used by Limitorque to mount the second terminal block. The referenced CAR questioned whether these brackets were seismically qualified.

Limitorque confiemed in its letter dated February A. 1983, that L-brackets are not seismically qualified and recommended that these and the auxiliary terminal blocks be removed.

Limitorgue identified 40 Limitbeque operators that could have ungualified L-brackets.

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2. Environmental During the project effort to qualify electrical equipment in a harsh savironment, several concerns arose. The valve vendors were contacted, Limitorque was requested to perform a detailed records search showing component types and materials, and various inspections were performed as the environmental concerns were addressed. The results of this effort are as follows:

a. Limitorque performed ths terminal block tests described in Test Report B0119. The test included the following blocks:

i Marathon 300 and 1600; Buchanan 0222 and 0524; General l Electric EB-5; and Curtis Type L. However, the test did not include Buchanan 0824 Kulka 622, or Beau 7600, which are used on some Limitorque operators, but are acceptable for alld-environment locations.

Rechtel's review of test and vendor data determined that tested types are acceptable for use outside containment in harsh environments. The terminal block types not tested will be replaced with tested types.

Because the test parameters do not envelop Midland's l

inside-containment parameters, all terminal blocks on inside-containment units will be removed. Terminations will be made by direct attachment or by use of qualified splices oc lugs,

[

b. Limitorque indicated that units with Class B motors have not l

undergone testing for inside-containment conditions and contain limit switch, gear frame, and cover materials not recommended for use inside containment.

These motors and actuators are being replaced with units tested for inside-containment use having proper class H insulated motors rated for 50C ambient and the component materials recommended for use inside containment. It was determined that all existing Class H motors are also

, acceptable for the 50C ambient conditions inside containment I (resolves Items B.1, B.2, and B.6 of additional deficiencies, MCAR 46. Rev 2).

c. Actuators with de motors have been tested by Limitorque in Test Report B0009. An analysia is presently being performed i

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Bechtel Associates Professional Corporation 28637 "c^R 4. I28708 Final Report page 7 to show that Limitorque test parameters exceed the service conditions of the motors.

d. Some actuator drains ara not installed in the lowest position or are missing. Limitorque has stated that test units for both inside- and outside-containment use had actuator drain holes plugged and that the inside-containment motors had T-drains installed in the lowest position. Safety-related units in harsh environments will be inspected to ensure the same drain-plug configuration as the tested units (resolves ,

Item B.5 of additional deficiencies, MCAR 46, Rev 2).

e. Initial information obtained from purchase order files, quality verification documentation package (QVDP) files, and early inspections of unit nameplates did not always agree.

However, the discrepancies have been resolved and I identification made of serial numbers, component types, and ratings for each unit, except certain units in which the terminal block and control wire type could not be identified from the available documentation. These units will be inspected and the terminal blocks and control wire replaced if they cannot be identified as qualified types (resolves Item B.3 and B.7 of additional deficiencies, NCAR 46, Rev 2).

f3 Notor operators in the plant are mounted in various orientations. It has been determined that safety-related units in a harsh environment are mounted in positions less severe than the positions used in the qualification tests and are therefore acceptable (resolves Item B.4 of additional deficiencies, NCAR 46 Rev 2).

g. It was determined that 0-rings do not perform a safety function in operators mounted in positions in accordance with Limitorque's recommendations.

l h. Unidentiflod terminal blocks (nonpower lead connectors inside l the operators) were observed in some Limitorque operators.

Bechtel has used walkdown data and vendor-supplied information to identify these terminal blocks.

Bechtel has reviewed all available information and, based on this review, has initiated purchase of qualified components and l Limitorque operators to replace those that are unqualified directly from Limitorque Corporation.

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., NCAR 46 l28708 12 8 6 3 i yinat R. port Page 8 Safety Implications and Reportability

1. Nonenvironmental

a. Seven of the eight valve operators having underrated terminal blocks are located in the component cooling water.and service water systems and are used on safety-related valves. These valves must function on an emergency core cooling actuation signal. The potential exists for a short circuit /flashover, which could render the valves inoperative.

Based on the potential safety concerns, this ites was considered reportable. This deficiency was reported by Consumers Power Company on January 14, 1981, to R. Sutfin, R. Cook, and R. Knop of the Office of Inspection and Enforcement, Region III, U.S. Nuclear Regulatory Commission, as a reportable deficiency for Nidland Plant Units 1 and 2 in accordance with 10 CFR 50.55(e).

b. Project engineering completed its safety evaluation of the seismically unqualified L-brackets on August 24, 1983, and concluded that because the mounting brackets were not seismically qualified and could not be qualified, and failure of the bracket may cause failure of the valves preventing operation of the affected systems, a safety concern exists.

If the L-brackets in safety-related valve operators failed during an earthquake, they could cause an electrical short circuit that could render the valve inoperable.

In its yobruary 4, 1983, letter, Limitorque recommended that the suspect 40 valves be inspected for the presence of L-brackets, the mounting brackets and auxiliary terminal blocks removed, and wires reterminated directly to limit switches when found. If the brackets are removed as stated above, no safety concern exists. This concern was incorporated in NCAR 46, Rev 2, and the NRC was verbally notified by Consumers Power Company on August 29, 1983.

c. The space heaters supplied on Class 1E equipment were not qualified to meet Class 1E guidelines. Because space heaters were connected to safety-related circuits, their failure could disrupt Class IE power supply to safety-related circuits and disable the operators. This cor.cern was incorporated in NCAR 46, Rev 1, together with other environmental concerns as discussed in Item 2 below (closes Recommended Action Item 7 MCAR 46. Rev 2).

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Bechtel Associates ProfessionalCorporation 28637 NCAR 46 128708 Final Report Page 9

2. Environmental The environmental qualification concerns identified in this report could have potentially caused a malfunction of some LimitorgJe operators that would jeopardize the performance of the i safety-related systems in which they operate. These concerns were incorporated in NCAR 46, Rev 1 (closes Action Item 7. MCAR 46, Rev 2).

Probable Cause

1. Ed. environmental t

a. Underrated Terminal Block Limitorque states that it does not stock Marathon 100 Series terminal blocks. However, Limitorque stated in its January 21, 1981, letter that when its field service engineer visited the Midland jobsite in November 1977 to increase the number of points on the terminal blocks for 66 operators (P.O. 7220-N-132), he may have procured the subject terminal blocks locally. Limitorque further explained that an additional 20 terminal blocks (140 Series, manufactured by

! Cinch Jones) were shipped to Midland to make up for quantities damaged in an earlier shipment. These blocks are similar to Marathon Series 100 blocks and may have been used by the Limitorque service engineer to terminate the 460 V motor leads. According to Limitorque's July 1, 1982, letter, the root cause for the presence of underrated terminal blocks was the lack of adequate training for a newly employed field service engineer.

b. Limitorque has supplied unqualified space heaters.

Unqualified space heaters were wired into actuator safety-related control circuits without recognizing that IEEE and regulatory guide qualification would be necessary. The valve supplier and/or Limitorque did not implement procurement document requirements, and Bechtel did not identify the deficiencies during vendor print review.

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c. Ungualified L-Bracket Limitorque operators used in the qualification test report did not use L-brackets. Limitorque used L-brackets without recognizing that seismic qualification would be required for L-brackets.

2. Environmental These environmental concerns occurred before establishment of NUREG-0588 tequirements. Probable root causes are as follows:

a. Limitorque built some units with components different from those tested in its qualification test units, but did not indicate the change. Limitorque also did not have records for some units indicating which specific type of terminal block and wire components were used.

b. The valve supplier and/or Limitorque did not implement procurement document requirements, and Bechtel did not identify the deficiencies during vendor print review.

Corrective Action Bechtel has identified each Q-listed Limitorque operator and the deficiencies in each operator. The following corrective actions and schedules have been developed to correct each deficient valve operator. All activities listed below will be identified in the Remaining Work Schedule and Construction Punchlist and are scheduled for completion before the fuel load date for each Midland unit (closes Recommended Action Item 8, MCAR 46, Rev 2). .

1. Nonenvironmental

a. Underrated Terminal Blocks During Limitorque's June 1982 inspection / replacement trip to the Midland jobsite, all underrated terminal blocks (Marathon l

100 series and Cinch Jones 140 series) were replaced by correctly rated Marathon 300 Series terminal blocks on 0458u

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j i 2 8 6 3 incAn 4' i2B7DB Final Report Page 11 operators purchased on P.O. 7220-N-132(Q). The reports from Limitorque and fleid engineering covering the inspection / replacement activities have been accepted. This deficiency is considered resolved (closes Recommended Action Item 2 NCAR 46, Rev 2).

b. Space Heater Rach safety-related operator will be inspected, and the space heater will be disconnected from the circuitry. Wiring diagrams and electrical schemes will be revised to reflect this. Operators located in nontemperature-controlled

environments shall be flagged for periodic inspection for condensation danese in accordsace with Limitorque's recommendations (resolves Item B.8 of additional deficiencies, NCAR 46. Rev 2).

c. L-Bracket Bach safety-related operator will be inspected for an i L-bracket and, if found, the L-bracket will be removed i

together with the auxiliary terminal block. The wires will be terminated directly to limit switch points in accordance with Limitorque's recommendation (resolves Item B.9 of additional deficisacles, NCAR 46 Rev 2).

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2. Environmental

a. Terminal blocks used on operators inside containment will be '

removed. Termination will be made via direct attachment or use of qualified splices or lugs. Untested terminal blocks in units outside containment will be replaced with a type that was tested.

l Nonconformance Report (NCR) 3780 will be assigned disposition on this basis. The NCR was generated because of existence of the unqualified Buchanan 0824 type terminal tiock on Limitorque operators on Purchase Order 7220-N-123A with l Wettinghouse Electric (

Reference:

Item B.1, Page 4 of Interim Report 12).

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b. Motor operators inside containment that were not tested for postaccident conditions are being replaced with units that have Class H motor rated for 50C ambient temperature and with the actuator component materials qualified for inside-containment use. The replacement units will not have terminal blocks or space heaters (resolves Itams B.1, B.2, and B.8 of additional deficiencies, MCAR 46. Rev 2).

c. The de motor qualification test is being reviewed to verify that it deconstrates qualification for the motors for the required service period. If these motors cannot be shown to be qualified, they will be replaced with qualified equipment.

d. Units in a harsh environment will be inspected for location of drain holes to verify the same drain plus configuration in the motors and actuators conforms to the tested units (resolves Item B.5 of additional deficiencies, MCAR 46, Rev 2).

e. Units that have terminal blockr or control circuit jumper wires that have not been identified as the type tested will be inspected and the unidentified components replaced (resolves Item B.3 of additional deficiencies, MCAR 46, Rev 2).

l f. Bechtel will purchase new qualified operators and components (terminal blocks and control circuit jumper wires) for replacament for activities listed in Items 2.b and 2.e above.

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! 3. Action to Prevent Recurrence l

l To prevent recurrence of the above concerns, the following will be addressed (closes Recommended Action Item 8 MCAR 46. Rev 2):

a. The purchase order requirements for new valve operators will require additional information about component types and materials used in the units to ensure applicability of Limitorque's qualification test reports.

b. All new valve operators for use inside containment will be purchased without terminal blocks or space heaters.

c. New replacement units will be purchased directly from the Limitorque Corporation under more stringent inspection requirement at Limitorque's shop during the manufacturing cycle.

d. A programmatic approach to environmental qualification has been established for Midland as part of the response to NUREG-0588. The environmental qualification of safety-related 0458u

Bechtel Associates Professional Corporation l g1BB3? MCia 46 128708 Final Report Page 13 equipment in a harsh environner.t is being reviewed. This program, described by the EnvironsMatal Qualification Report, has been audited by the Midisnd Project Quality Assurance Department and was reviewed in January 1983 by the NRC.

l h Submitted by: $M f.dM h T. Ballweg M4 ^ Mechanic.al Group Supervisor Approved by: NT e

% E.M. Hughes  %

Ann Arbor Project Engineer Concurrence by- /#

M. Fravel Chief Mechsnical Engineer

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Concurrence by: /

frs* t.Engineering SMth Manegrr j Concurrence  : I '

r M.A. Dietrich [_"j

Project Quality Assurance Engineer 0458u

LIST OF VALVES WITM Ll"lTOROUR OPERATORS SIptember 12, 1983 ,.

(Q-listed ord:rs esly)

Limitorque's Problem Listinar rs) *

• y)

PA throuah PW listed covered under MCAR 46 O PA Underrated terminal block (power lead) LA)

PB Terminal block environmental quellfleetions (power lead and nonpower lead) -.I PC Limitorque motor Insulation - for class 8, temperature else and environment quellfications not available P3 Qualification for Internal wiring not avellable PE Orientation of operators and/or gearbox /11mit switch compartment down PF Orientation of the operator unacceptable for dralnege(**)

r0 Torque switch quellfication not available (for material other than Fiberltel P2 Space heater quellfication not avellable PJ 0-ring quellfication for the service conditions questionable PK Purchase order files QVDP files Information and/or lastelled nameplate data do not egree P%J PL Limit switch quellfication not evalleble (for maternal other than Fiberlte) C33 PM Unquellflad L-brackets for terminal blocks  %:

P3 Incorrect delve motor shaft key material PP C"3 Cear drive lubricant unacceptable for service conditions PQ Nonnelf-locking gearing C%)

PR Problem transferred above, " Refer PM" PS Unquallfled de motors PT Peerless ac motors (outside contelnment, harsh environment units) quellfication not evallable

, PU Later PY Later PW Later P1 Later PT Later i

i PZ Replace complete actuator assembly MOTES:

3- Listed problem not appitcable for the operator.

$- Physical Inspection Indicates insted problem does not exist for the operator.

K- Shows concern exists for listed operator.

! #- Tha problem that once existed has been resolved.

• - Thz terminal block types (a, b, c, etc) onlet on Limitorque operators according to the references (A 8. C, etc) listed below.

Terminal Block Types References

s. Buchanan 0722 A Preliminary Inspection by Bechtel Fleid et Inception of the Terminal Block Problem Investigation

b. Buchenen 0324 8 Random Inspection Report by Limitorque, 7/31/82 (Com 037836) l c. Buchanan 0724 C Inspection Report, 1/11/82 by Resident Engineering (Com 054886)

d. Suchenen 0824 D Quality surveillance Report 86, 1/13/82 for Purchase Order 7220-M-132(Q) for Fast Closing Operatord

e. Curtle Type L E Preliminary Inspection by Bechtel fleid of NCR 3246

f. Cinch Jones Series lab r 10A, P.J. Corcoran to E.M. Hughes, 4/14/82 (com 066550)

g. Merethon 100 Series C 10M, L.E. Davis to E.M. Hughes, 7/15/82 (com 077868)

h. Marathon 300 Series H 10d, P.J. Corcoran to E.M. Hughes, 9/23/82 (com 085853)

1. Beau 7600 J VP 7220-M2ay.]

j. Kulka 622 K VP 7220-M247-2

k. General Electric EB-5 L 10M, L.F. Deils to E.M. Hughee, 4/19/83

1. auchenen 0514 ee - Field engineering will Identify the operatore during the inspection of operators for other problems.

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3 LIST OP VALVES WITN l.IMITORQUE OPERATORS (Coattneed) ,.

CD Code V-Iv7 Location G

• for Motor Outside Lleitorque's Problems Listing * %

In- c>>

P.O. No., List of items Operator side Conteln- * .

Vindor, & Limitorque on Identift- Con- esat MCAR 46 Terminal Tstsi on order P.O. Ma cation tala- Marsh Mild PPPPPP PPP PPP PPP PPPPP 81ock S/U Order Numbers M-247 Item Number ment Envr Envr ABCDEF GHJ KLM NPO PPPlUVWXY R S TI PZ Type System Weearke 1 2 3 4 5 6 7 8 9 10 11 12 13 J-258(Q) 386103 521 2.A IMO-1013A I $$$ 99 9I9 e99 999 99 9 h(8) 18CA Flthir 388816A 522 2.A 2MO-1113A X 999 99 9I9 e99 999 99 9 h(K) 2BCA CMtesis 3B88168 523 2.A 1MO-10138 I 999 99 9I9 899 999 99 9 h(K) ISCA Qty 12 3C8036A 524 2.A 2MO- 11138 I 999 99 9X9 #99 999 99 9 h(K) 2BCA -

N

525 2.8 1MO-1014A X $99 99 9I9 899 999 99 9 h(8) 18CA g l

526 2.s 2MO-1114A X 999 99 9I9 899 999 99 9 h(K) 28CA i 527 2.8 IMO-10148 I 999 99 eX9 899 999 99 9 htX) 18CA 528 2.s 2MO-11148 I e99 99 9I9 e99 999 99 9 h(K) 28CA O CD 523 4 1MO-1024A X $X9 99 9I9 e99 999 99 9 j(8) IBCA

530 4 1MO-10248 1 9I9 99 919 999 999 99 9 j(K) IBCA 531 4 2MO-11244 1 9X9 99 9I9 899 999 99 9 j(R) 2BCA 4 4 2MO-11248 I 9I9 99 9X@ #99 999 99 9 j(K) 2BCA 1

532l 20 Crand Total 276 (includes 1B surplus operators)

~

$4 90 114 g ~( m* .

N Og 400 3, ,,,,, ,,,,,_ ,, ,,,,,,,,, ,,

f ar identified for a particular J problem. Zero (0) Indicates that the problem has been cempletely resolved.

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1 0111y Rev 3 Sheet 9 of 9