ML20215L829

Rev 8 to TVA Employee Concerns Special Program Final Element Rept CO19201-SQN, Conduit

ML20215L829
Person / Time
Site:	Sequoyah
Issue date:	05/04/1987
From:	Russell Gibbs, Martin M TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20215L813	List: ML20215L810 ML20215L829 ML20215L842 ML20215L852 ML20215L857 ML20215L860 ML20215L872
References
CO19201-SQN, CO19201-SQN-R08, CO19201-SQN-R8, NUDOCS 8705120390
Download: ML20215L829 (58)

Text

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'TVA EMPLOYIE CONCERNS REPORT NUMBER: C019201-SQN u?

SPFCIAL PROGRAM

.ke REPORT TYPE: Sequoyah Nuclear Plant Element REVISION NUMBER:

8 (Final Report)

TITLE: Conduit PAGE 1 0F 15 REASON FOR REVISION:

Revised to include TAS and SRP coments Revision 2 Revised to include SRP coments and finalize report Revision 3 Revised to include SRP and TAS coments Revision 4 Revised to include SQN response and finalize report Revision 5 Revised to include'.[AS and.SRP editorial coments and Revision 6 finalize report

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• w d l'.

i Revised to include additional evaluation resultinE from NRC coments Revision 7 Revised to include additional SQN and corporate response and finalize report Revision 8 PREPARATION PREPARED BYt My-- d I h '

4jelhAT g p ATURE

' DATE REVIEWS PEER s 0-SLu....

8 ll*b7 V 1 NATURE DATE W" gpy

,g SIGNATURE

/ / DATE CONCURRENCES 8705120390 870500 AM 0 3

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CEG-3 A'~5A'k

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<a7 SIGNATURE DATE SIGNATUhE DATE APPROVED BY Am%L e/4 /r1 N/A SP MANAGER DATE MANAGER OF NUCLEAR POWER DATE CONCURRENCE (FINAL REPORT ONLY)

• SRP Secretarys si5 nature denotes SRP concurrences are in flies.

1317T

1rVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN

• ,o SPECIAL PROGRAM REVISION NUMBER: 8 ses PAGE 2 0F 15 I.

INTRODUCTION Eight concerns (categorized below) were evaluated at Sequoyah Nuclear Plant (SQN) as a result of the generic applicability determination resulting from the Watts Bar Nuclear Plant (WBN) Employee Concern Task Group (ECTO) Element Report Conduit C019201, within the Construction Category.

IN-85-512-003 Quality of Conduit Materials IN-85-512-002 IN-85-3414001. ' Torquing of Flexible Conduit Couplings OW-85-007-608';Sec.?

IN-85-138-001 Condulet Cover Installation IN-85-201-003 Excessive Conduit Bends IN-85-856-004 EX-85-066-002 No related site specific concerns were identified. Due l

to the Browns Ferry Nuclear Plant (BFN) ovaluation, flexible l

conduit installation deficiencies resulting from the generic l

implication of Significant Condition Report (SCR BFNEEB 8632) are lR7 addressed. Also, the generic implication of the WBN-NCR 6529 l

related to SNP was evaluated.

l II.

SUMMARY

OF PERCEIVED PROBLEMS (a) Quality of conduit material may not be assured at the time of receipt and maintained through proper storage techniques.

(b) Site procedures for the installation of flexible conduit may not I

require proper tightening of the couplings which contributes I

to loose and damaged flexible condult. Additionally, site lR7 procedures may not have adequately addressed flexible conduit l

installations related to seismic and thermal movement nor I

minimum bend critoria considerations.

l (c) Control rathods may not be in place to prevent dirt and debris from entering conduit bodies while condulet and pull box covers, etc., are removed.

(d) Allowable cable side wall pressures may have been exceeded resulting from excessive conduit bends between pull points.

'TVA EMPLOYEE CONCERNS REPORT NUMBER:

C019201-SQN SPECIAL PROGRAM REVISION NUN 8ER:

8 w

PAGE 3 0F 15 4

III. METHODOLOGY (a) Reviewed Quality Technology Company (QTC) expurgated files, as well as other files for additional pertinent information, reports and any corrective action recommendations available on concerns.

(b) Reviewed the WBN ECTG Element Report Conduit (C019201), applicable sections, to determine the applicability to SQN.

(c) Sequoyah Standard Practice SQA-45 was reviewed to determine the procedures implemented for receipt inspection and storage requirements for, permanent plant material.

A * ( *;b-k,,,* !,

7* r (d) Reviewed Administrative Instruction AI-11. " Receipt Inspection, 4

Nonconforming Items QA Level / Description Changes and Substitutions" Revision 37, to determine the inspection requirements for noneritical systems, structures and components (non-CSSC) items.

1 2

(e) Reviewed Administrative Instruction AI-36 " Storage. Handling, and Shipping of QA Material". Revision 9 to determine the i

storage requirements related to conduit material and ensure compliance with American National Standards Institute (ANSI) 45.2.2-1978.

(f) Discussions were held with cognizant Power Stores Unit (PSU) supervision personnel to identify any related quality problems associated with condulet materials.

(g) Walkdowns were conducted with PSU warehouse personnel to observe actual storage facilities.

(h) Cognizant Division of Nuclear Quality Assurance (DNQA) personnel were interviewed to determine receipt Inspection and surveillance requirements for conduit materials, i

(1) M&AI-6, " Installation of Conduit and Junction Boxes", Revision 6 3

was reviewed to determine the tightening requirements for flerible conduit coupilngs.

(j) Discussion was held with cognizant Modifications and Additions l

Unit (M&A) personnel related to tightening of flexible lR7 conduit couplings.

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"TVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAM o

REVISION NUMBER:

8 PAGE 4 0F 15 III. METHODOLOGY (continued)

(k) Discussion was held with cognizant Division of Engineering (DNE)

Central staff personnel to discuss the generic application of SCR BFNEEB8632 and the adequacy of the policy memorandum from i

W. S. Raughley to Those listed dated May 14, 1986.

(1) Discussion was held with cognizant DNE Electrical Engineering (EE) j personnel to discuss the movement requirement for flexible conduit installacions for floor mounted equipment.

(m) Discussion was held with cognizant DNE (site) EE personnel to discuss;the. minimum length requirements of flexible conduit connections'for< floor, mounted equipme'nt.

(n) Reviewed M&A Instruction M&AI-6, Revision 6 to determine the procedure requirements related to condulet cover installations and craft surveillance instructions for identifying damaged or defective conduit components.

(o) Discusrions were held with cognizant M&A Unit Engineering and craft personnel pertaining to condulet cover installation, procedure clarifications related to excessive conduit bonds, and craft training with emphasis on 0-40 requirements and guidelines to prevent the installation of damaged conduit components.

(p) Discussions were held with cognizant DNE EE (site) group leader to determine what actions SQN had taken to identify and resolve problems associated with excessive conduit bends.

(q) Performed an additional evaluation of the implementation of the i

requirements of MLAI-6 related to the torquing of flexible conduit I

couplings and evaluated the special maintenance instruction lR7 (SMI-0-317-33 Rev. 1) for adequacy related to the generic l

implication of WBN-NCR-6529 and related issues.

l IV.

SUMMARY

OF FINDINGS (a) Review of the QIC expurgated files and other files revealed no additional pertinent information than that discussed in findings below.

(b) The WBN ECTG Clement Report Conduit (C019201) contained sections which related to material problems, loose flexible coupilngs, fish tape and debris, and excessive conduit bonds which were pertinent to the SQN evaluation.

'TTA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAN 2

REVISION NUMBER:

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PAGE 5 0F 15 IV.

SUNNARY OF FINDINGS (continued)

(c) Sequoyah Standard Practice SQA-45, Revision 21 stated "The power stores and QA staff supervisor are responsible for the receipt and receipt inspection as defined in AI-11 (reference paragraph 17.D. page 59). Additionally, paragraph 19.D page 59 states, " Handling, storage, and shipping shall be in accordance with the requirements of AI-36."

(d) Administrative Instruction AI-11, revision 37 stated "PSU clerks shall receive non-QA, and/or non-CSSC items." No guidelines.are established to describe what constitu,tes, ace.eptable material or what actions are to be performes if defective materia.ls.areidelivered, i.e.;

over, short,5 substitu'te, damaged, or defective (OSSD or D) items.

(e) Review of Administrative Instruction AI-36, revision 9, indicated the storage levels as specified are in compliance with the appropriate ANSI Standard (ANSI 45.2.2-1978) and conduit bodies are stored as Tubular products which require level D storage.

(f) Discussions with cognizant PSU supervision personnel indicated no quality problems had been identified with conduit or conduit fittings.

(g) Walkdowns with PSU personnel of Level D storage areas for conduit bodies revealed scattered surface oxidation (rust) on some conduit bodies with more severe rusting at the threaded area. Approximately 1 to 2 percent of the conduit bodies were judged not acceptable for installations-assuming the entire length would be installed. The storage area and placement of material were in compliance with the requirements of Level D storage as specified by ANSI 45.2.2-1978.

(h) Discussion with cognizant DNQA personnel indicated receipt inspection was performed per the requirements of AI-11 and surveillance activities were in accordance with the frequencies specified in Surveillance Instruction Letter (SIL-181). Level D storage areas were subject to surveillance activities performed by QA. No known quality problems with conduit or fittings had been identified.

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'TTA ENPLOY H CONCERNS REPORT NUMBER: C019201-SQN

e

,' o SPECIAL PROGRAM

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REVISION NUMBER:. 8 s

PAGE 6 0F 15 i

IV.

SUNNARY OF FINDINGS (continued) 1 (1) Review of M&AI-6, revision 6 revealed installation of conduit-and conduit systems were performed in accordance with the National Electric Code and flexible metal conduits were installed a

in accordance with the specific instructions included 1

in paragraph 3.2.6 which adequately addresses the tightening-1-

requirements of the flexible conduit coupling.- Verification is performed by QA personnel (Reference paragraph 4.0 item E).

i No deficiency was.noted.

i (j) M&A personnel, stated-that loose couplings on flex conduits had

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not been; encountered.during. installation inspections.

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L'el 6.;;

l i-(k) Discussions with cognizant Central Staff personnel revealed l

SCRBFNEEB8632 to be potentially generic to SQN as related l

L to the lack of guidelines for flex conduit installations l

contained within General Construction Specification (G.C.5) G-_3.

l The policy memorandum from W. S. Raughley to Those listed dated l

May 14, 1986, was determined to be fully adequate to address the 1

j thermal & seismic flexible conduit issues related to the Code l

of Federal Regulation Section (10 CFR 50.49) eine mounted devices.

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and all 10 CFR 50.49 equipment, such as motors and chillers, at I

a point-6 feet or greater above the floor level. However, floor.

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mounted 10 CFR 50.49 equipment at a point less than 6 feet above 1

the floor level was not addressed and is considered inadequate l

in this respect since a minimum length of 18 inches is required l

for flexible conduit to allow a one inch movement. No objective l

evidence was found which ensures this 18 inch criterion was met l

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during flexible conduit installations. Additional comments related l'

i to the W. S. Raughley policy memo are included in paragraph IV.Q.

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of this report.

l (1) Discussions with cognizant DNE EE personnel revealed 10 CFR 50.49 floor mounted equipment below a point 6 feet above the floor level would be acceptable, provided the flexible conduit minimum length l-is 18 inches, to accommodate one inch movement during a seismic i

event.

(m) Discussions with cognizant DNE EE personnel revealed that before the issue of G.C.S-G40, revision 0, dated August 6, 1975, no minimum length criteria had been established for flex conduit

)

installations. It was noted however, that N2E-860, revision 0 issued November 6, 1973, required a one inch movement with no length given. Before this date, G.C.S. G-3 was utilized and consequently could have resulted in flexible conduit installations j

which do not conform to the requirements of G.C.S G-40 nor i

the 18-inch minimum length criteria for floor mounted l

10 CFR 50.49 equipment.

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TVA EMPIAYEE CONCERNS REPORT. NUMBER: C019201-SQN J.'.

'SPECIAL PROGRAN REVISION NUMBER: 8

.w PAGE 7 0F 15 (n) M&AI-6, revision 6,.does not address the installation of condulet or pull box covers to prevent dirt and debris from entering the conduit between cable pull activities, or for the initial installations of conduit bodies. Also, the procedure contains no.

guidelines.for the craft to assure that damaged or defective conduit components are not installed.

(o). Discussions with cognizant M&A engineering and craft supervision indicated recognition of the need for procedural clarification in regard to covering all openings in the conduit run by

'either permanent and/or temporary means. Additionally, it was

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recognized that paragraph 3.1.1 of M&AI-6 should contain a precaution.to thefinstaller not to exceed 360 degree accLaulations of bonds betweenzpull, points in_the c~onduit body, and verification e

should be performed by QA personnel. It was also noted that no forma 1' training by TVA was in place to ensure the craft were familiar with the G-40-requirements and good practice methods to prevent the installation of damaged or defective conduit components.

(p) Discussion with cognizant DNE EE Unit Conduit and Grounding Group revealed that walkdowns controlled by Special Naintenance Instruction SMI-0-317-32 were performed by SQN to identify excessive conduit bends. A sample of 16 worst-case conduits using the criteria of multiple bends (>360'), long lengths,' elevation changes, and conduit overfill (>30% full) were chosen for evaluation. No conclusive evidence has been documented to show that sidewall pressure'or pull tension criteria has been violated at this time.

(q) As a result of the NRC review of Element Report C019201-SQN, Rev. 6 l

entitled, " Conduit", additional evaluation was deemed necessary to l

determine the adequacy of the' implementation of the requirements of l

_M&AI-6, Rev. 6 in regard to the tightening requirements of flexible l

conduit couplings.

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During an NRC Safety System Outage Modification Inspection performed I during December of 1986 and January of 1987, several flexible lR7 conduit connections were determined to be loose or improperly l

l installed and are to be considered as findings or observations l

contained in Inspection Reports 50-327,328/86-68.

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Since the established program for flexible conduit installations l

(M&AI-6, Rev. 6) requires torquing of the flexible conduit coupling l

[

per the manufacturer's instructions and verification was performed l

by QA/QC personnel, the implementation of the established program l

I was questioned.

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'TVA EMPLOYEE CONCERNS' REPORT NUMBER: C019201-SQN f

z SPECIAL PROGRAN REVISION NUMBER:

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PAGE 8 0F 15 During evaluation of the implementation. aspect of this issue by 1

the WBNP-ECIG on 2/26/87,.it was noted that SQ-CAR-87013 had been 1

issued ~and indicated the requirements of.H&AI-6 Section 3.2.6.4 l

had not been followed, in that.the manufacturer's instructions had 1

not been utilized during the installation of. Thomas & Betts l

flexible conduit assemblies. The specific. violation noted, resulted l from failure to torque the flexible conduit coupling per the l-e manufacturers instructions, l-l As a result of the NRC observations and the issuance of SQ-CAR-87013 l g., 'TC

'the credibility of the' established program is questioned. Past l

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installaticn. practices are suspect of being deficient related to l

liers / manufacturer's. instructions where torquing I

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all.supp%o's?.are. required (Ref G.C.S.-G40) and a determination,

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instruct n Since l

must be made to identify and correct these deficiencies.

the established program requires the preparer of the Work Plan, l

l or Work Release / Maintenance Request to specify the installation i

L criteria, the manufacturer's instructions should be made available 1

i to the preparer for inclusion into the appropriate work control l

documentation. Training of the appropriate personnel (craft, l

engineering, and inspection) should be-given to ensure the 1

appropriata manufacturer instructions are followed during the I

installation and inspection activities associated with flexible 1

c.^"

4 conduit-assemblies.

l IR7 P.

A review of Special Maintenance Instructions SMI-0-317-33. Rev. 1, I

a 4

' dated 08/11/86 entitled "Walkdown Procedure for Identifying Flexible 1 Conduit Connections in Violation of General Construction l

Specification Cumber G-40" was performed and conversations with I

Central Staff DNE Personnel were conducted to determine if the 1

i tightening requirements for flexible conduit assemblies were I

g t

verified during the walkdown activity. The results of the review l

and conversations indicated the primary purpose of the walkdown l

.(SMI) was to assure that installed flexible conduits have adequate l

lengths for thermal and seismic movement for installed Class 1E l

l equipment and devices on the 10 CFR 50.49 list in response to the-l l

i generic implications raised for the WBN NCR-6529. The preparer l

of the SHI established the requirements of the instruction primarily l E

as directed by the W. S. Raughley memo, dated 05/14/86, titled.

l

" Electrical Issues - Flexible Conduit." The following comments 1

4 are submitted:

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a.

The W.'S. Raughley memo, dated 5/14/86 does not fully address I

the generic implication of the WBN-NCR 6529. Instructions were l

not prescribed to identify and resolve flexible conduit minimum l

band radius violations nor to ensure other aspects of flexible l

conduit assemblies (such as torquing per the manufacturer 1

instructions) were adequate. Additionally, 10 CFR 50.49 floor l

mounted equipment at a point less than 6 feet above the floor l

l is not addressed.

(Ref. C019201 - SQN, para K) l l

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TVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAM REVISION NUMBER:

8 PAGE 9 0F 15 b.

Even though the Policy memo discussed above did not address I

the minimum bend radius of the flexible conduit assembly, the l

preparer of the SMI defined a deficiency as any condition l

found that is outside the limitations defined in Attachment 1 l

(Ref. para 3.3) and directions were_given to the walkcown l

personnel to document these deficiencies (Ref. para 5.3.1.a).

l Contrary to the above requirements, the flexible conduit l

assemblies were not inspected for minimum bend radius violations l

per Table 3.2.6-1 of Attachment 1.

The walkdown program did IR7 include 10 CFR 50.49 equipment less than 6 feet _

l above the floor which was evaluated for thermal / seismic l

movement, considerations even though this issue was not I

addressed in the above mentioned Raughley memo.

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l- ? u. *,

c.

The walkdown performed did not include the verification of l

torquing of the flexible conduit coupling per the l

manufacturer's instructions.

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Conclusions:==

(a) No guidelines are established in AI-11 to define what constitutes acceptable conduit and fitting material or what actions are to be taken if defective materials are delivered. No quality problems with conduit or conduit fittings have been documented,'therefore.

Employee Concerns IN-85-512-002 and IN-85-512-003 were determined to be not factual.

(b) M&AI-6, revision 6, the controlling procedure for conduit system installation, adequately addresses flexible conduit coupling tightening requirements. M&AI-6 is inadequate by not requiring the lR7 installation of condulet or pull box covers to prevent dirt or debris from entering the conduit between cable pulling activities.

Employee Concern IN-85-138-001 was considered factual. M&AI-6 is also inadequate by not containing instructions to the craft to prevent the installation of damaged or defective conduit components.

(CATD C019201-SQN-06)

(c) The requirements for flex conduit installation for 10 CFR 50.49 l

pipe mounted equipment and floor mounted equipment as stated in l

G.C.S G-3 inadequately addressed minimum lengths required to lR7 accommodate thermal and seismic movements of the equipment. Current l requirements for flex conduit installation as stated in G-40 does l

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-1rVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAN REVISION' NUMBER: 8 PAGE 10 0F 15 accommodate seismic and thermal movement considerations. The l

' potential for imposing unqualified stress to pipe mounted devices l

or floor mounted equipment by over-extending flex conduit during I

thermal and/or seismic movement of the pipe or equipment and the l

subsequent stresses imposed on the cable inside the flex conduit l

installed prior to the issuance of G-40 should be re-evaluated l

by DNE.

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1 The W. S. Raughley memo, dated 5/14/86 does not fully address the I

acceptability or prescribe the necessary instructions for all l

active TVA nuclear sites to follow which would ensure past l

flexible conduit-: installations are in complianca with or meet l

the intent of' Gene.ral. Construction Specification G-40, Rev. 9, l

SRN 11.'LImplementation of the, Policy memo at each site would l

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only_ partially addres's the generic implication of WBN NCR-6529.

l (CATD 19201-NPS-01) lR7 l

4 The findings noted above related to the tightening of flexible.

I conduit couplings indicated that G.C.S.-G40 should be revised l

to include specific torque values as required per the applicable l

j manufacturer in order to assure this information is available to-l the constructing organization.

(CATD 19201-NPS-02) l l

l The specific CAR (SQ-CAR-87013) should be re-evaluated for l

i significance and generic applicability based primarily on the l

uncertainty and lack of clearly established requirements related l

• c this issue (as contained in G.C.S.-G-40) which is utilized at l

j '

all setive TVA nuclear sites. The disposition of this CAR should-1 include steps to identify the manufacturers, determine which l

require torquing of the connectors, and provide verification that

-l past installations meet those requirements. The ARPR should I.

include the necessary procedure revisions (including those l

involved in maintenance activities); training of appropriate l

perso.inel, and verification that all future work activities l

are performed in accordance with those instructions.

l (CATD 19201-SQN-07)-

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- Note: The generic implication of employee concerns IN-85-341-001 l

and OW-85-007-008 was deemed factual since weaknesses were l

identified in the implementation of the requirements of M&AI-6.

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Contrary to the requirements of SMI-0-317-33, Rev. 1 related to I

flexible conduit installation deficiencies, the minimum bend I

radius was not verified in accordance with Table 3.2.6-1 of l.

(CATD 19201-SQN-08) l

"TVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAM REVISION NUMBER:

8

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PAGE 11 0F 15 (d) It was concluded that conduit runs containing more than 360* of accumulated bends between pull points were installed at SQN.

Therefore, the Employee Concerns IN-85-201-003, IN-85-856-004, and EX-85-066-002 are considered to be factual. DNE is evaluating the findings established during the walkdowns governed by SMI-0-317-32.

Reference SQN Element Report C010900 for further details.

(e) M&AI-6, revision 6 does not include provisions to cover all openings in the conduit runs, by either permanent or temporary means, to prevent dirt and debris from entering the conduit body and is considered inadequate in this area. Additionally, no precaution to,ths'.ee. accumulations of bends between pull points installer of the conduit run exists which prevents exceeding-360 d,egr within the conduit; body.- No qualitylassurance inspection exists, which ensurss excessfve bend criteria are not violated.

Employee Concerns IN-85-138-001, IN-85-201-003, IN-85-856-004 and EX-85-066-002 are valid because of the controlling procedure deficiencies noted above. Reference Construction Category C010900 Element Report for SQN for details on DNE's evaluation of sidewall pressure tests and multiple bend criteria results and details on SQN's walkdowns.

V.

ROOT CAUSE (a) AI-11 was inadequate in that nonsafety-related items were being received by nontechnical personnel without guidelines-established to require the examinations which detect burrs, sharp edges, flattened threads or irregularities detrimental to the installation of cables during pulling activities. The apparent cause of this deficiency is management oversight resulting from the lack of awareness that defective "nonsafety-related" items such as conduits and fittings may have a direct impact on plant operation or safety-related features such as cables.

-(b) Because of an oversight by the DNE preparer / reviewer or the lack of consideration for the required Safe Shutdown Earthquake and interface movement criteria, General Construction Specification, G-3 did not provide guidance for installing flexible conduit offsets, lengths, and thermal / seismic movement allowances.

The attempt to correct the movement criteria for floor mounted equipment as contained in Sequoyah Specific Construction Specification N2E-860 was inadequate in that the movement criteria for this floor mounted equipment as established by DNE, contained-insufficient qualifying instructions for utilization during installation. In conclusion, the design criteria were not established or conveyed to the responsible construction organization in a manner which would ensure the proper installation of flexible conduit assemblies.

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"TVA EMPLOYEE CONCERNS REPORT NUMBER:.C019201-SQN

','~,:

SPECIAL PROGRANc REVISION NUMBER:

8 PAGE 12 0F 15 V.

ROOT CAUSE (continued)

(b)

(continued)-

The need for establishment of these specific criteria may not I

have been recognized by DNE personnel.

It should also be noted l

that the established program for generic applicability.

I determination is deficient or weak in.that significant conditions I

such as those identified on SCR BFN EEB 8632 (related to this I

issue) remained unidentified at other plants largely because of lR7 this generic applicability determination being performed by the l

initiating organization with limited knowledge of the I

generic: implications.. Similar weaknesses were also noted in the l

CAR (SQ-CAR-87013)'and re-evaluation related to significance and,

l generic applicability was determined necessary.

I i-j (c) DNE specification writers had not recognized the importance of establishing a procedural control program to prevent dirt and debris from entering the conduit or to ensure good workmanship practices were utilized during conduit installation.

This type of requirement should have been a part of the specification in use at all TVA sites.

(d) Because of the lack of understanding of/or an oversight by the, preparer and reviewer, General Construction Specification G-40 issued by DNE did not restrict conduit bends in excess of 360 degrees between cable pull points as required by the National Electric Code. This action resulted in inadequate installation criteria supplied to DNC which allowed the potential for excessive bends between pull points to' exist during conduit system

. installation. Reference Construction Category C010900 Element Report for SQN.

VI.

CORRECTIVE ACTION The following CATDs led to the following Corrective Action Plans (CAPS) from SQN Line Management.

CATDs C019201-SQN-01 through 05 are restart items.

CATD C019201-SQN A memorandum from D. W. Wilson, Project Engineer, Sequoyah Engineering Project, to Z. M. Kabiri, Nanager, Site Services, on October 21, 1986 (RIMS #B25 861021 039) requested that Administrative Instruction AI-11 be revised to include specific guidelines for receipt inspection of non-QA/non-CSSC items with emphasis placed on the quality of conduit material and accessories.

TVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAM REVISION NUMBER:

8 PAGE 13 0F 15 CATD C019201-SQN Sequoyah Engineering Project Electrical Group Number 2 is presently performing a field walkdown of flexible conduit installations according to Special Maintenance Instruction SMI-0-317-33, dated August 11, 1986. Work Requests (WRs) will be written to correct any discrepancies discovered.

CATD C019201-SQN A memorandum from D. W. Wilson, Project Engineer, Sequoyah Engineering Project, to R. W. Olson, Modifications Manager, October 21, 1986 (RIMS B25 861021 040) requested that MLAI-6 be revised to provide instructions to cover all openings in conduit runs to preclude dust, dirt, and debris from ent,ering the. conduit system during installation activities.7, L * *" :~h ; ).

CATD C019201-SQN-04'- A memorandum from D. W. Wilson, Project Engineer, Sequoyah Engineering Project, to R. W. Olson, Modifications Manager, October 21, 1986 (RIMS B25 861021 040) requested that MLAI-6 be revised to include precautions for the conduit and cable installers to prevent installation of bends in excess of the 360 degree maximum accumulation between cable pull points and to require QA verification of compliance.

CATD C019201-SQN-05 Sequoyah Engineering Project Electrical Group Number 2 is presently performing a field walkdown to identify conduits with multiple bends between pull points which would cause excessive sidewall pressure according to Special Maintenance Instruction, SMI-0-317-32, dated June 20, 1986. Any violations found that have potential safety impact after complete evaluation will be documented in accordance with SQA 118 and Work Requests (WRs) will be written to rework the configuration of the conduit system and install new cables.

CATD C019201-SQN-06 SQN DNC Modifications will review the requirements of MLAI-6 with emphasis of G-40 to all DNC electricians. This CATD is not a startup item.

CATD 19201-NPS-01 DNE will reevaluate the instructions given in the l

W. S. Raughley memo to determine acceptability of all Class 1E flexible i conduit installations. This evaluation will include all generic lR8 implications of WBN NCR 6529. From this evaluation a total plan will l

be de sloped to resolve this issue.

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TVA will initiate CAQRs if unacceptable conditions are determined to I

exist.

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e TVA EMPI4YEE CONCERNS-REPORT NUNBER:

C019201-SQN' 6

SPECIAL PROGRAN' REVISION NUMBER:

8 PAGE 14 0F 15 l

• 'CATD 19201-NPS-02 G-40 or appropriate engineering _ requirement l

specifications will be revised to add a table of maximum and minimum l

torque values for each flexible conduit fitting in each size used by_'

l TVA. DNE will establish values for future installation requirements I

and backfit as required. SCR W-577-R was written on March 3, 1987 l

and will assure that proper corrective action is taken.

l I

CATD 19201-SQN-07-CAR-87013 has been reevaluated by Electrical l

Modifications and QA and we concur that this is a nonsignificant l

condition..We do feel that this CAR should have been sent out to all' l~

active TVA nuclear sites for generic applicability and have requested I

the Quality Sys,tems-Branch' to initiate.

l Engineerijhasidetemibedtheljguidtightflexibleconnector manufacturersi by brand name, that have furnished connectors for SQN.

l l

Technical.information on torquing requirements were obtained. This I

research indicated that the manufacturers recommend adherence to UL

-l 514B requirements for torquing because the connectors are UL approved l

per those tests.

l_

lR8 G-40 or appropriate engineering requirement specifications will be l

revised to add a table of torque values (as shown in UL 514B) for I

flexible conduit fittings to be used for future installations.

l Regarding current installations, no corrective action will be required l based on.the plant's maintenance history. The lack of torque values l

1 has not been shown to be a significant problem. We conclude that this l

work is not a restart item. Estimated design completion date for this l

activity is October 1987.

l 1

M&AI-6 will be revised to incorporate changes to G-40.

Affected' site l

personnel will be trained on the site procedure revisions.

l 4

l CATD 19201-SQN-08 During the performance of SMI-0-317-33, Rev. 1, the l

bend radius requirement was inadvertently omitted. After further l

study, we have decided to eliminate this requirement from the l

procedure.

Flexible metal conduit provides only mechanical protection I for cables and no failures have to date been attributed to bend radius I

violations. Also, in general the seismicity of the equipment does not l

depend on the bend radius of the flex. conduit as 1 me ss there is l

adequate movement (which we have assured) and the flex conduit does l

not exceed 6'-0".

Based on the above, we conclude that this work is l

not a restart item. After plant restart, a flex bend radius I

sampling (per MIL STD 105D) will be performed. Estimated completion I

date for this activity is October 1987.

l

'TVA EMPLOYEE CONCERNS REPORT NUMBER: C019201-SQN SPECIAL PROGRAM REVISION NUMBER:

8 PAGE 15 0F 15 VII. GENERIC APPLICABILITY Violations in cable side wall pressure because of excessive conduit bends are potentially generic to BLN and BFN.

Additionally, the lack of inspection requirements for condulet cover installations, flexible conduit couplings, and quality of conduit materials are potentially generic to BLN and BFN.

Issues pertaining to Flexible Conduit Configuration as described in SCR BFN EEB 8632 may be generically applicable to WBN.

VIII. ATTACHMENTS,.,

L r- :-;.

A.

SCR BFNEEB 8632 B.

Policy memorandum from W. S. Raughley to Those listed dated May 14, 1986 C. Listing of concerns indicating Safety Relationships and Generic Applicability D. WBN-NCR-6529 lR7

H T7AcMm/7~- A b!r4 Nfj$35'il

.~

i

~

'$1GNIFICANT CONDITION REPORT s-E ' h'] "'

0'3 0 Es '

A t

O Pro,ect/rtent and unit W Date I )_J SCR Number and Rev.

BFN/Cowa w O M b4 I. 2. 3 07 4 7 /3/F /,

6/27/86 SCRBFNEEB8632

@ Preo.,er end oroenization L*9.J NU CON NCR NoJDeficiency Report

@ ASME Code Walter J. Dembosky, (F r NU CON una Only)

MA O Yee S No 5 @ Contract Number

@ Vendor E 3 /.A. _._._.

.1/A

,e

@ Requirement Violated j.,fJ nib La_c o min.1 t_a# im 1.c_.s rui_th e rm a l t:Lqxercut. rand. era tins.__

... @ sou,ce of R. qui,ement

.E _ General _Contrnctl.nn Snecif.ica.tJan G-411 (3lJa) gf E

8 ce.cription of Condition

' h, The installation of flexible conduit was not specifically addressed in General

.E.

Construction Specification.G.b The lack. of~ guidance for installing flerible d

conduit offsets, lengths and thermal / seismic mov6mant allowances creates uncertainty as to whether installed flexible conduit can perform it's safety j

function.

?>

~.

g g

6 System g

EiR UNID/ Component Code (For DNE Use Only) v a r. I n,, e M/A E

Date of "3

Occurrence 33,34,m, O Est.imated O Actu>i L Z JMethod of Olscovery g, n,,,,,

7,ny,,,,,nn, p,yggy 5

Significant Condition pe?%/3/6 organization t'o ostermine Corrective Action j

Adverse to Quality

=>-

X s

No

@ If significant, NEB.NLS Cor. tact LL J D to LL.r.J Contacted by 7

0 W.

J. Dembosky T

r.

rah n nma n is a Potential Generic Co,ndit' son l if yes,initlete Attachment 5 of NEP 9.1 and L.RJ erench chief / Project Engineer /DNOA Quality site I

Evaluation Required?

O Yes list Attachment 5 RIMS Accession No.t Manager (Dist ' ute as required-.eee block 30.)

If no. describe in block 28. O:No k, yg

/8h g

g 1

Root Cause 7>

S S

c

~b 5

=

@ Corrective Action i

f/

~~

t'a

.E c

4 m

Et 6

'o

.__ _ ~

E 18 Coordination Revievv of DNE Work (Provide initials)

$ Scheduled Date of j

Completion

'5 j E Action Required to Prevent Recurrence (ARPR)

Q l

b I

j (cont on p. 23 l

TVA 10700 (DNE446) JUl'DA

l j

i fMal ARPR (continued)

SCR Number and Revisir.n'.--SCRBFNET43632

~... ;.m )

~

-1

~

[

.{

=

[TT61 Scheduled Completion Date of DNE Work p'

' ' " ' E*N I 161 Does the correctJve action deviate l

from a desien criteria requirementi -

O ve O no g

I n I Deelsa Criterie kement Number r

Llij Eaception Request Number u

s

,sgg

.C I 19 I is an ECN required?

5 $/ O vei i

L20J. 8Fpag.onhaaguie?u g g om w3 g,,.g

If'yes, ECN number O 'Airecti proiect compietion ichedure U

3 c

w No I

O Affecti schedure or reisted activitte's O

Z l

'f O

• t.

c:

No lmpact

..s o

O IMI verification of Adequacy and Accuracy of Blocks 13 20 Above Signature and Date

=>.

'I' g

h f7I6l Approval Signature and Date (Distribute as required.

=....a o

See block 30.1 RIMS Accession Number o

~~" ~ -- '

e L

r'.- n '

~

• th 5

@ Is it a generic condition?

if yes, describe.- -

{

3 a

w O

(n O

m z

O O

ITfl Preparer and Date 3

L2.iJ Supervi or and Date o

Q: T ARPR Recommended By and Date L26.J ARPR Approved By and Date 6

O

~

W ITTI Concurrence of Designated Quality Reviewer for ARPR and Date (Distribute as appropriate-See block 30.1 RIMS Accession Number I 281 Remarks The generic review for this condition was handled as a result of SCR's for other projerts.

See Continuation Sheet

[ 79 I All DNE/NU CON Action Complete

=>.

Signature, Organization, and Date

[

(Attach Completion Verification Sheet)

Ei m

.9 I ao Itif needed, attach a separate sheet for edditional distribution.)

O ej 2 RIMS, SL 26 C-K

[

NRC Resident inspector

,O 3 NU CON Site Dedicated Data Base Director of NU CON 2

NMRG

~

$s,.

h DNE Project Engineer ANI (For ASME Code items Only)

Records Storage Facility X

~

jE NU CON Project Manager DNOA Site Quality Manager i j Manager, Engineering Assurance

[

Preparer Director of DNE RIMS Accession Number M

NEBCMS (for ASME Code items)

}

Director of DNQA

~

I L

t I

l I

I

• k Part B (Continued)

ER Rev.

O CAO Report No.and Rev.

crpRwrenoAti Page 2 of 4 1.

Tabulate Data on All Failed and/or' Affected Components, Structures, and Systems: Give descriptions, model and manuf acturers' numbers, and original and revised design criteria and/or specifications. (See Note 5.)

• .2,..

• • i i *

/

f 2.

Failure Mechanisms of Affected Components, Structures, and Systems: State whether each affected component,,

structure, and system became open or closed, inoperative, or shorted;or had shortened life, reduced accuracy, increased drift, reduced capacity, etc. (See Note 6.)

s o

3.

Alternate Uses and Generic Implications: Identify alternate uses of the components, structures, and systems in the plant. Discuss generic implications. (See Note 7.)

4 4 Component, Structure, and/or System Failure Mode (s): Give description and extent of effects of failures on each

~

component, structure, and/or system involved. (See Note 8.) -

t e

1

(

(:# p t

RIMS Accessi:n Number ENGINEERING REPORT

-)*

(By DNE for CP Plant)

E R 'Rev.

O (By Site Director's o,,,na.iion to, at p,,,,,

e Cao neport No.sao Hev

""' '"d unii i, t,3 Site Di,ecior s Cont.ci.nd Dai. Noissa.d iot Nuc Piania onlyi BFN /F'"'^" R M/o t Steve Willetrd 7/7/A6 c-SCRBDIEEB8632 O se

?w$

p.tinst, Statement of CAO (See Note 1.)

's The installation of flexible conduit was not specifically addressed in u,

8 General Construction Specification G-3.

The lack of guidance for 3

installing flexible conduit. offsets, lengths and thermal / seismic movement allowances creates uncertainty as to whether installed flexible jg conduit can, perform it's safety function.

'See Note 2 on page 4 for completing Part B.Part 8 continued on pages 2 and 3' Yes (OL Nuclear Plants Onlyl Due Date of Failure Evaluation Preparation of Feiture No Evaluation is required?

FSAR Revision Required?

] Yes No Conclusions (See Note 3.)

c

~

.9 n

y _5

.h_ 'r**

W es 3 Bw A

i QZ

u. O ci Recommendations (See Note 4.)

t' E

- [.'.

o

=

Suggested Corrective Action Date Failure Evaluation Received Date Management Notified Operational Limitations / Actions Justification For Continued Operation c

0 3S o%3 d Ei Conclusions 2.E 2-EO2 O iT3 t* ~

16 determinate item?

ye, no g

Po t en tia lly R e port able to N R C ?....................................................................

Yes No Deficiency Adversely Affacts Safe Operation of Plant?

Yes No DNE Contact Approved By and Date Prepared By and Date TVA 108211 (DN E446) cc: RIMS.

(Submit to RIMS as standalone document.)

. ~..

yy g j

5l ' Cause ef th) CAQ:. Discuss what the CAO w s tus 12, e.g., a program brsakdown, new rigulition, anitysis Cr oesign error, test results showing a deficiency, and/or failure 13 meet design, criteria and/tr purchase specifications. Include

-s

' calculations, analysis results, test r:sults, and/or purchase requirements not rnit, or cther bases. (See Nate 9.)

=

c e'

+

8.

Consequences on Plant Design Functions: Discuss effects of failures on all involved component's, structure's, and

- system's at>ility to perform their plant design functions. (See Note 10.)

.+

s..

.O.

3 * *;" *I -i,; * !,., -

i

'~

}

o 7.

Justification for Conclusions in Failure Evaluation: Discuss the reasoning based on the information above which leads to the conclusions stated. (See Note 11.)

9 Prepared By and Date Coordinated in Site Director's organization with:

Verified By and Date Discipline Lead Engineer (s) and Date Approved By and Date.

t I

s

[.....

y:.yl) t,'

d AT' M C-M N N.

84; - 3' L e..

}

,, C those listed s*

e f

i 1 t

,1 :

W. S. Raughley, W8 C126 C-K i

f

-9

• I ' / $ t.

May 14,1986

' i f.sy?-

5 Id' p

ELECTRICAL ISSUES - FLEXIBLE CONDUIT t j p>$0 a.

j

• i,

n t?*

The purpose of this memorandum is to provide guidance for each Lead Engineer to determine the adequacy of flexible conduit lengths for thermal and seismic movement for installed Class 1E equipment and devices on the I

ICCFR50.49 lists.

~

i;

),

General Construction. Specification G-40, presently defines the minimum flexible conduit -len}th for thermal movement based on conduit siz

.3.2.6.3) and seismic movementi(Section 3 2.6.2).

/.

I incorporated inEo C240 asi o~utlined"In' These requirements were E

d.

In January 1986, it was discovered that some flexible conduit'at WBN was not installed in accordance with the requirements of G-40.

has revealed that Further study thermal movements for pipe-mounted devices and seismic movement for certain floor-mounted equipment was not based on vorst-case conditions.

" Seismic / Therma 1' Movements,- Class :1E, Electrical C

,

• defining the maximum',vorseicase seismic / thermal movements'for a a

C (Attachment No. 2).

' may be used to evaluate mov2ments for each plant,The values in this s,

each piece of equipment or device may be obtained.or specific movements for The seismic and thermal movements for pipe-mounted devices are shown in load tabulations and isometric drawings which can be obtained from DNE - Civil Engineering Branch and can be used to identify seismic / thermal pipe movements which exceed the 1-inch criteria for evaluating devices on a case by case basis.

The original scope of this item was to only look at devices on mechanical systems which had not been thermally exercised to their 1Luit; however, I

devices are in question.since the plants have not experienced a seismi

}

a-

~

Based on preliminary information from WBNP,

• conduit lengths for pipe-mounted devices or ficthe problem of short flexible not appear to be extensive.

or-mounted equipment does The following course of action shall be taken to resolve the flexible conduit issue:

1.

All 10CFR50.49

' experience move,mentelectrically-operated, pipe-mounted devices that (thermal plus seismic) of greater than 1 inch shall be inspected per the flexible conduit requirements of SRN-G-40-11 (Attachment 3).

2.

A random sample of 10CFR50.49 electrically-operated, pipe-counted

=

devices that experience movedent;of 1 inch or less shall be inspected" per MIL STD 105D based on a 96: confidence factor.

i e

' !l ;

? [..;

~.

7-

,'.,?-

.p. -

t. /,

. :.y -- 2.'

• , S......e dQL. )'" f 4

.!v;p e'e,' Those listed e/*kb DY I' ', f,'

5, -

ELECTRICAL ISSUES - FLEXIBLE CONDUIT r.v

. f, t

.- s-1,f 3.

All flexible conduit connected to floor-mounte'd cast or forged 3.

10CTR50.49 equipment, such as motors and chillers, at a point six feet :

.l or greater above floor level shall be inspected to assure that,.the

_ flexible conduits meet the requirements of SRN-G-40-11.

f

./g If the inspections reveal unacceptable installations, the flexible conduits I

shall be documented and reworked, replaced, or referred to DNE for dispositi~on on a case-by-case basis.

The fragnet for reso'Ivi.ng the flexible conduit issue is Attachment No. 4.

This effort sho61d.

flexible conduit is;b'e st,arted immediately to expedite completion of the I

sue.

)

MDt W. S. Raughley b

J. D. Collins, P-110 SB-K G. T. Hall, DNE, DSC-A, Sequoy'ah H. C. Rutherford. A7-BFN ENG

\\

J. L. Springer, 9-111 SB-K DLL:BB

.m-076120.09 m

eO Y

.u c

{,--.-...- %,,.'. ', :

c a.

r TABLE A 9-SEISMIC /TIIERMAL MOVEMENT e

FLOOR-MOUNTED EQUIPMENT AND DEVICES PROJECT SilEET METAL C011ST.

PIPE-MOUNTED DEVICES **v. b:'

110RIZ MOVEMENT (IN.)

CAST OR FORCED EQUIPMENT MOVEMENT IN ALE ~

CON!!ECTION llEIGIIT ll0RIZ VERT DIRECTIONS (INCIIES)-

BFN i.5 5 3 Feet

+0.75" +0.15"

-+3.6 P

- 6 Feet 6 9 Feet.

-+1.25" +0.31"

. J..,

~

-+2.0"

+0.5"

'2..',.<',..

~

SQN i.5 Same as BFN 5:

14.0 WN 15 Same as BFN 14.0 v

BLN 15 Same as BFN 13.7 9

f*

C*

• e

. A TTAC H MEkT #1 E'

Page 1 of 2

','f i SQN (CP 5-27-70), VBN (CP 1-23-73), and Bl.N (CP J

12-24-74) l Electrical Cable Issues 6

i

- i Issue:

Flexible Conduit Connections to Class IE Equip =ent

'DNE Document Time Frame (Section)

DNE Recuirement 11/6/73 N2E-860 (SQN only)

'~

(Section 2.5)

Use length of flex conduit to allov 1-inch movement in all directions connecting to Class IE equipment.

~

and 8/6/75

't G-40?RO thru R2 I

to 10/21/80

( S e c tio'n' 3.'2. 6)

Use minimum 18-inch length of flex connecting to Class 1E equipment.

{

10/21/80 to G-40 R3 thru G-38 R9 1/15/86 (Sect. 3.2.6)

Above plus addressed flexible conduit connections to thermal (pipe) movements.

t s

066120.03 CBS: 4-30-86 e

9

_=

?

i

/,,,

'c

Page 2,,, of A

~,

BFN (CP 5-10-67)

Electrical Cable Issues

.e i

Issue: 'F'lexible Conduit Connections to Class 1E Equip ment DHE Document t

_ (Section)

. DNE Tier Trace Recuirement i

.-...c,'

'5/10/67 to I

G-3 issued

', 5;,-

1/15/86 12/17/62 and Provide flexible '

conduit connections later revisions (Se~ction B.10) to equipment (such as motors, valves.

lighting fixtures).

L r q q. f..-

9 r

No specific require-

' ment for min. lengths of flexible conduit it relative to seismic and thermal (pipe) movement s.

1/15/86 to G-40 R9 Addresses type of 3/17/86 (Sect. 2.3 flexible conduit and 3.2.6) and lengths (per size conduit) relative to seismic and thermal (pipe) movements.

l I

i l

L 066120.03 5-1A-fL CHS: M -et-1 r

', NA (cney fCE 44sl OE CALCULATIONS,

(($CQq@{

,[

E SMic /TNERbut Mo1EMEuTS-CLASS 1E ELECTRICAL conootT YLYNART.5 retrARiNG QRGANs2 A TION KEY NOUNS (Consult RIMS DESCRIPTORS LIST)

' O'.

cE e -M A 2 F LE%lBL E e o W D u rr, C t.A 5 5 I E, 6-40

' anANCH/P AOJkCT IDENTIFIERS E sc :

talculations are lesww, pr*9 ems must answrv that the oriennal(ROI MIMS eccomion Rev (for RIMS

• usa)

RIMS' accesalon number s

B41

'860428 001 APPLICA8LE DESIGN DOCUMENT (5) p_

i i

SAR SECTIONIS)

UtilO 5Y5TEMis)

R_

Revision 0

}

Rt R2 R3 Statement of Problem ECN No. lindicate if Not Apphc2Nel This Wculdiow is needed 4c>

24Mv[dd I.

c dor.umen t- %e yno%rnum

• • yy yy $ j scism'\\c l uennal moweds Of b4SS lb C}cCkr_lCM Opipyg;f V

Revieweg M

• /"

where. f\\tsible conduil is D

Y - (-[

m z

aliac.hed 40 gipe mounted gpa2siggg devic.es on fiermalh mov'in.q systems and 'lo br wunTed u i aii na..eeee by thi revision.

< n. j p

ggy 'g 7

hl I/kT'r7vi*lonf*d situdur es.

d jgl List all pages changed

- by thl: revision.

Does this revision contain any unverified asst =ptions'l (YES or NO)

NO l

• Str^ct fbnd c41culations, sbaMe inble desi results and piping l

analysis resulb were used -fo provide conservative maximun1 Germal / seismic vneve m e n f.s G r 0. lass IE epipmer.f wWh Re.sibie conduit abched. Matirnum rneyements of pipe-rnounded devices on herrnally ynoving systems and Nr vnounied etuipment in cate6 ry I situdure.s are proVided.

l This Calculation 't5 used id suppord t'eVIStot1 l0 -{o 4hc l

6eneral OensirudioM 6pedfiC4dion 6-40 And cofredive actiori for LIC.R 65 2 9 and si cR c,56 9.

Also used io docum ent l.

ee. Seisymc. Sirnulation Tes4- ?cogram on Motor Control Ceder "

m he TVA MEDS document attival systern.

l Wcrob cmd ref urn orifinal to G.C. Gale VfLc.151 c-K.

w?.nw l

cc: MIMS. SL2'5 C-K

, j.-i$;'s v_/lhenna.}

Hovements - Class IF Flev3ble_Conddi--

'l

~

y

' a:

s,,,

)' ;, '{

l NFORM AT10h) 00LV - NO CH E M ikl 6s REGUlR&D e...

_.[

Table oT Contcais f ac e.

1. 0 Purpose 1

2.0 Scope I

c 3.0 Pipe MounYed Egipmed 2.

[NeN' Wude5r.@ldwf i'

~

3.)

Bre i.

S. 0.

Bellefoute. Nudear Plant 3

(

3.3 Wah Ba r Nudear. Phd 4

s.+ s uey ak Wudear %^

4 q

4.0 Floor Mouded E uipmec 5

t 4.1 Cost or Forged Equ'iprner 5

4. '2.

Epiprnen-}- using Sheet Mek Construckovi I

F.o Flenble Cendui : Win Bon End.s ALcked to

-\\o Same 'Rtg d 54raciu t-e-6.o Summoq 11 7.0 References '

12.

AppendN A Maimum berneds Gr Belichte Mudear %

A pendh B Seisnac Smuhdion Test Pgram 7

on Motor Codrol Ceder b

i llE E

=

)

[",, '* hsyk / TLt Aal Moomuts - C le T p

.xci,

/

13 Fl a k), (o n gui [

~;

comevrio

_ oari 4"23-y

..... m.., 3-u 1 I

L f.O 90 9a5 f_

'The Pusease ai' 'th's ceuen\\ dica phe is 40 picVide vnadroum imucMGdh br MYble(ovdu'tk'

_a-

%. au.a um 1s #es oed c,gQek(-M-NNbwI NM be'tskiiG YnoM ENE4k.

This cdlculation is.

used W suport 4ke ushu movemed* 6 odu 6 hidon 1.0 4o i

6eneru)

Coas roch ou S eaftcdien G - 4O.

p l

2.C Seepe T% ca\\cu\\a%a couers f\\en h\\e ceau\\+

mMmeds 40 class IE yiye trouded devices on erney vmu'ing syknes ed akkynees to Fler munkt eqwpmed in cegory i

s4eue\\ures..

b 2

?.

$=

< ~9%A / neaml. hmeubs - Obs TF %& c,,nur,.__ /3 2

mn c

. u.f

_....,,,g.,, &n-n-

.,, a m

-n...

ti.

3.0 he Mounkt GoulomecF -

E a

3.1 Ban,..F4 mf FJu c.h r 'Pla n +

A {@iq eqsk sevey ivas made iw rderence 7.1 4o deber dn e Mi,um %ew) auf sets a6c If0\\JefAfh6 1

OldVd 4

{ qw h05e QgficqMS on de Nin Gem Sddy Reher \\a\\ges 64SSRQ e he

%rty.

These tqcesevri inmemm

%ermd yipe movemhs is %e p\\ad due u &

high

m pecduce ci %e ynain siam l'in e.4 {s is eleo an eaud6p'm3 seismic. condi Aion due. io

~

he long eyk-evided ebdute of ibe MSSRNJ.

i The ewdop'ing nomd for cod' iud %emi

. ancf seim's c loedh i

3s 3.6 0 'm.

iu any dicechon bi Me kr'i v_odo.1 v\\one-and 1.% m. up in %c Ver+1 cal clit ecfion.

g

.Am r p 'i p m 3 a m i y t e ervey was made.

2*

b Nl

.i. l.~. gesipic / hwil MameA -Ol.53 IE Fk ibb CnnduP-- I

~.)

soit ti 9

(r t

. e,r.

....... Be#.... (-n-a y,..

...,... A s_... + u.-e l

W rd.ucace 71 -lo dektmine vaumum temeds '

br 9'ip mouded deaces on 'p'ipg syshnts 4

afodsed 40 45e brus. htwwg %%ble covdui r

~

obchees. The enudop ng, mov<nted for c mbined o

thermal,. :se.safcfad bu.s-loading 'rs 1.0 tn.-

in each divedron.

]

s 3.2 Bellefonte N ud ea r ~%n+

h surn, of %e p@o$

an\\ys1s oi % e enirs steam

\\ine ( rannth

7. @

was vnde. Er

&is caiculai-ion.

The end of

% e e.denct ecJ va\\qe. s-haduces on 4he mim steam syskm va\\9es were used &

mssimum 2-hermal and

'~

bt 8 tocons Fcry.

Tothuinted vnovemeab os e doton in Appeuhv A.

'b ecdop g g

E 5.

0

=

M_h (k

d _9

,I

.sY b.h.** '

(*h '

h

,4

• t

. I peg fj 4

6 h

hg h

hhbl O h

,k } ? '* -. *.

. *1 '{** o

• f-y p

p e

/*

s

.'=?.*L's o'

E

• e

.gesysms.

sm+.s -.

... 3.:::. u:,..aq-:.vgggggggg t-

. n w.-

[.gs.p::.wa :*.

-. r

't.--

.....g;jgY g gdggg s f,:ht$$0fg* M TV'

-/?fd$$[f$

rl

• . ;;4 ' *

..s

~.

+. u 4 memes for %etnE and simsc loadn$

s T.%.-

i g

Li

.... :e

.....y z.7o in. in any direckon.

k.

g^

3.3 Wah h kludeur Plan; lb lnIorrned concublion uit% -lhe sqpetssor oY

-.;.9%_

..?

L.-

q... -- :

• A)g

%e rigorous pip'ig badys'tCsecHer.

woc made ~

4o debt r mi n e * ^4d P"S Se'3*'"'d bt"I

'Of I

w rnowmeds for pipe vrounied clevices loin hdtb 7

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I-SEN-G-40-11 PR.EL) Ml AJ AEy o

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TABLE OF ~ CONTENTS - Change the titles of sections I.4, 3.2.6.2, 3.2.6.3, and 4.0 to read:

i

._ s

• E 1.4 Definitions 3.2.6.2 Floor-Mounted Ecuipment and Devices. Seismic Movement Considerations

_in Seismic Category I (Class I at BFN) Structures 3.2.6.3 Pipe-Mount ed Devices. Thermal / Seismic Movement Considerations 4.0 DIVISION OF NUCLEAR CONSTRUCTION /0FFICE OF NUCLEAR POW PREFACE - Change the first paragraph to read:

... future nuclear' plants.. This specification also applies to future-1 I

modifications and'thelr subsequent niintenance activities at Browns Ferry Nuclear Plant (BFN) in accordance with N. R. Beasley's memorandum to a

C. R. Hall dated January 15, 1986 (B22 860115 015). 'This specification may be used...

i Section 1.2. Pane 1 Change first paragraph, first sentence to read:

'N It is the responsibility of the Division of Nuclear Engineering (DNE) to prepare.

Section 1.2. Pare 1 Change last paragraph, first sentence to read:

It shall be the joint responsibility of DNE and the Division of Nuclear Construction (NU CON)/ Office of Nuclear Power (ONP) to record...

Section 1.3. Pace 1-2

' Change to read:

The DNE Electrical Engineering Branch (EEB) Central Staff is responsible for the contents of this construction specification.

NU CON or the ONP site r

director is responsible for enforcing the requirements of this general construction specification.

Section 1.4. Pace 1 Change title and add definitions.

1.4 _ Definitions Seismic Caterorv I (Class I at EFN). Those structures, systems, or co=ponents which perform primary safety functions. They are designed and constructed to assure achievenent of their primary safety functions at all ti$esincludingaconcurrentSafeShutdownEarthquake(SSE).

I

{-

0 066104.03

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SEN-G-40-11 Page 2 of 10 Sefsmic Caterory I(L)(Class II at BFN).

Those portions of structures, exceIit-that only limited structural integrity is required.

6

• 7

designed and constructed to assure achievement of their limited struct They are integrity at all times including a concurrent SSE ural 4

Safe Shutdovn Earthauske.

An earthquake which produces the maximum vibratory ground motion for which structures, systems, and' componen perform a primary safety funciton are designed to remain functional.

Section 2.2. Pace 2 Change to read:

be designated.on DNE detailed design... Major materials and tho

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i Section 2.3. Pare 2-1"~ 7 -

' Change first paragraph, last sentence to read:

but'not requisitio'ned by DNE... flexible conduit, and other minor material

_Section 2.3 Pace 2 Change first paragraph, last sentence to read:

DNE approval for their use is contingent upon the following:

_Section_2.3. Pare 2 Change third paragraph, second sentence to read:

The following types of stainless steel flexible conduit are acceptable fo these applications:

Boa, Inc., type NB1-0 or NB1,-1 series, or equal..ServicAir Coc:pany SS r

Section 2.3. Pare 2 Change first' paragraph, first sentence to read:

Pressure-tight stainless steel flexible conduit (ServicAir SS63C extra flexibl stainless steel) as defined on the respective project's design drawings and as approved for use by DNE, shall be used for installations where an equipment s is required.

Section 2.3. Pace 2 Change last paragraph to read:

B If additional restrictions or linitations are required on miscellaneous materials to be purchased by NU CON /0NP, these restrictions...

Section 3.1.1. Pace 3 Change to read:

the respective sections of the latest edition of the Natio i

I (NEC), and the design drawings.

c Code 066104.03

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SRN-G-40-11 je Page 3 of 10 i

Section Y.1.2. Pare 3 Change to read:

If interf$rences oc. cur, the NU CON /0NP electrical engineer shall...

..i Section 3.1.3. Pare 3 Change first sentence to read:

..pronptly, the DNE project aball be consulted for concurrence after NU CON /0NP has coordinated.

Section 3.1.2.3. Pare 3 Section is incorrectly numbered.

Change to read 3.2.1.3.

Section 3.2.2.2. Pace 3'-5

' Change second' paragraph to scad:

InseismicCate[or[I(Ca'ssYatBFN) structures, exposed conduits shall...

Section 3.2.2.4. Pare 3 Change first sentence to read:

In conseisnic Category I (Class I~at BFN) structures, galvanized steel me=bers may...

N Section 3.2.2.8. Paee 3 Change second sentence to read:

The conduit interconnecting the two conduit bodies shall be sized by NU CON /0NP in accordance with DS-E13.1.4.

Section 3.2.4.2. Pare 3 Change last rentence to read:

An electrically conductive, antiseize ce= pound for metal surfaces (Thomas and Betts Conpany "Kopr-Shield"; Jet Lube. Incorporated "SS-30"; Burndy "Penetrox F."; or equivalent) shall be applied to the cale conduit threads.

Section 3.2.4.4. Pace 3 Chant,e first sentence to read:

service buildings.... embedded applications in conseismic Category I (Class I at B Section 3.2.6.1. Pare 3 Change first paragraph, first sentence to read:

. equipment and devices that rotate, vibrate, are subject to..

Section 3.2.6.1. Pare 3 Change first paragraph, second sentence to read:

..funktioningastheequipmentordevicegroundingconductor,...

1 I

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SEN-G-40-11 1-Page 4 of 10 Section 3.2.6.1. Pace 3 Change second paragraph to read:

,y FlexibleEonduitshallbeinsta11edbetweenconduitfittingsinexposedlengths*

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not exceeding 72 inches, except as noted on design drawings.

(For exceptions not noted on design drawings contact DNE project for resolution.) Rigid conduit shall be located as near the equipment and device as practicul.

The flexible conduit shall be prepared, assembled, and installed in accordance,vith manufacturer's instructions, including any torquing requirements where applicable.

The minimum recon: mended bend radii given in Table 3.2.6-1 shall not be violated.

Flexible conduit shall be installed without tvist and should be oriented away from heat radiating sources, such as a hot pipe and its insulation; After installation, stretched between flexible ~ conduit fittings.the flexible conduit aball not be tight or Section 3.2.6.21. Par leI' Change the title of section 3.2.6.2 to read:

3 I

3.2.6.2 Floor-Mounted Eauipment and Devices. Seismic Movement Considerations in Seismic Caterary I (Class I at BFN) Structures Section 3.2.6.2.1. Pace 3 Ec=ove section number "3.2.6.2.1" and change the first paragraph to read:

A During... allow for relative displacement of equipment or devices and a rigid conduit system. To ensure.

. floor-counted equipment and devices (such as motors...

Section 3.2.6.2.l(a). Pares 3-12 and 3 Change to read:

(a) When conduits connect to the top of seismic Category I (Class I at EFN) or Category I(L) (Class II at BFN) floor-mounted equipment and de. vices, an 18-inch minimum exposed length of flexible conduit aball be installed between the flexible conduit fittings installed at the rigid conduit coupling and the equipment or device.

The actual minimum conduit length required for a particular installation shall be as specified on design drawings or as calculated by NU CON /0HP using the equation in Figure 3.2.6-1.

This minimum length of flexible conduit vill insure that floor-counted equipment and devices are capable of sufficient movement in any direction.

The minimum bend radii for flexible conduit given in Table 3.2.6-1 shall not be violated.

Where physical limitations.

requirements, the NU CON /0NP electrical engineer shall be notified for resolution (by established procedures) with DNE project.

Firure 3.2.6-1. Pace 3 Delete figure and note.

t

_Section:3.2.6.2.1(b). Pace 3 Change to read:

h.

(b)

.. floor-=ounted equipment, such as control panels,.

1 066104.03

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<i SEN-G-40-11 Page 5 of 10 section 3.2.6.2.1(c). Pare 3 Change to read:

l 5

(c)

..'Ifloor-mounted devices, such as motors,

..to accommodate its minimum bend radius.

(See Table 3.2.6-1.),

Section 3.2.6.2.lfd)'. Pare 3 Replace with the following:

(d)

In cases where f1exible conduit is used for alignment purposes only and both ends of the flexible conduit are rigidly attached to the same seismic structure, the relative displacement between ends is zero and therefore exempt from thermal / seismic considerations.

Section3.2.6.2.1(e).PS[e~3-13-Addneesection.

+

,s.

(e)

Conduit coboe'c'tions'.to. cable trays sho'uld be avoided; however, if' conduits i

I are connected ~to seismic Category I (Class I at BFN) cable trays, an 18-inch minimum length of flexible conduit shall be installed as in (a) above.

Section 3.2.6.3. Pares 3-13 and 3 Replace (existing text. Table 3.2.6-1 and Figure 3.2.6-2) with the following:

3.2.6.3 Pipe-Mounted Devices. Ther=al/ Seismic Movement Considerations Where electrical connections must be made to devices (such as motor-operated valves, solenoid-operated valves, and temperature switches) which are attached to a mechanical flow system designed for thermal movements, flexible conduit shall be used to compensate for any expansion / contraction and seismic movement.

Typically, f'lexib'le conduit connected to pipe-mounted electrical devices which are subject to thermal movements are in the 1/2-inch through 1-1/2-inch range.

Excessive lengths in smaller flexible t

conduit sizes shall be avoided to decrease stress and prevent pull-out at ficxible conduit fittings.

3.2.6.3.1 Seismie Caterory I (Class 7 at EFN) Structures Flexible conduit to pipe-mounted devices in seismic Category I (Class I at BFN) structures shall be installed to compensate for eeebined thermal /scismic movements. The minimum length of flexible conduit shall be as specified on design drawings or as calculated using the equation in Figure 3.2.6-1_,

This minimum length of flexible conduit vill insure thac pipe-mounted devices afp t

4 066104.03

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Page 6 of 10

+

l 3.2.6.3.1. Seismic Category I (CIsss I st BFN) Structures (Continued) a I

i

• h capable of sufficient movement in any direction. The minimum bend'.

radii for flexible conduit given in Table 3.2.6-1.sball not be' violated.

3.2.6.3.2 Nonseismic Caterory I (Cines I st BFN) Structures Flexible conduit to pipe-mounted devices in nonseismic Category I (Class I at BFN) structures shall be installed to compensate

-for thermal movements oniv.

However, installing conduit per the given equation for seismic Category I (Class I at BFN) structures vill provide; adequate compensation for nonseismic category I (Class I i

at'.BFN)lthermal movements.

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Section 3.3.3. Pane 3 Change first sentence to read:

...boxeI located in seismic Category I (Class I at BFN)' structures shall...

~

Section 3.3".4. Pare 3 Change second paragraph, second senten:e to read:

The size lettering sh'all be determined by NU CON /0NP, depending,on the box size.

Section 4.0 Pace 4 Change title to read:

. DIVISION OF NUCLEAR CONSTRUCTION /0FFICE OF NUCLEAR POWER QUALITY CONTROL' Section 4.0, Pace 4-l' E

-Change to read:

NU CON /0NP hasI.-tbe'.'re spq'u s ib ilit y..... '.

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Page /Tof 10 Figure 3.2.6-1 e

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, Rigid Conduit Support

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E Coupling

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Flexible Conduit Fitting g

Rigid Conduit Support Exposed Flexible nduit fFlexible Conduit Fitting Exposed Flexible

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Flexible Conduit t

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f Equipment or Device

' Device d, -}

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_ Typical Arranrement of Floor-Mounted Ecuipment or Device and Pipe-Mounted

_ Device The equation for calculating the minimum length of exposed flexible condui and flexible conduit fittings installed at the floor-eo or pipe-counted device is as follows:

v ce FL = SD + K

Where, FL = Minimum exposed flexible conduit length between flexible conduit fitti (See Note 1.)

ngs.

SD = Field measured straight (Vben an obstacle prevents a straightline distance between flexible conduit flexible conduit route shall be determined and that distance shal for SD.)

K

= 1 inch or 4 inches (1-inch flexible conduit length is required for marimum seismic movement in any direction at cotiduit length is required for maximum combined seiseie/ the any direction at all nuclear plants.)

4 1

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Note 1:~- For ficxible conduit cut length, the field shall add to the minimum

[

• '<alculated length (FL), the flexible conduit length required for 8tonduit fittings and any additional length required for bend radii.

The minimum bend radii for flexible conduit given in Table 3.2.6-1 shall not be violated. Any exceptions'to minimum calculated lengths

• (FL)- and/or minimum bend radii shall be approved by DNE for Class IE installations.

t Note 2:

Exposed flexible conduit lengths shall not exceed 72 inches or be less than 18 inches, except as noted on design drawingo, for Class IE installations. For exceptions not noted on design drawings, contact

'DNE engineering project for resolution.'

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Flexible or Liquidtight Connector-X-

g

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OD l

Minimum Bend Radii for Flexible Metal Conduit Dimensions-Inches

,y Anaconda Type U.A. ServicAir SS63 American Boa B1-0 Trade Size I

(Inches) l A (Min.) OD (Nom.)

I A (Min.) OD (Nom.)

2 A (Min.)

A (Min.)

OD (Nom.)

4 1/2' 3.5

.84 2.5

.69 2.7 1.17-

.67 3/4 5

1.55 3.8

.94 4.5 1.23 1.04 1

6 1.'32 5

1.25 5.9 1.38 1.24-1-1/2 5.5 1.90 7.5 1.75 8.6 2.55 1.91 i

2 7

2.38 10 2.28 9.8 3.81 2.38 2-1/2 9.5 2.88 12 2.78 11 4.54 2.93 3

11.5-3.50 25 3.28 12.8 5.27 3.47 l-l 4

14 4.50 20 4.50 19.7 8.74 4.53 5

20 5.57 25 5.56 26.2 12.20 5.61

[

6 I

30 6.63 30 6.63 31.7 14.71 6.59 1

1.

Installations where seismic and/or thermal movement considerations are applicable.

2.

Installations where ' seismic and/or thermal cove =ent considerations are not applicable.

066104.03

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• EX 066-002 CD 19200 N HBN YYYY S)( THERE 'ARE il0T Ell 0VGH CONDUILETTS Ill

.T50183 REPORT C0llDUIT RUllS.

AUXILIARY AND REACTOR D UI L DIllG S. CollSTRUCTI0li DEPT. C0!!

C E Ril. CI IfAS 130 ADDITIDilAL IliFORMAT ION.

IN 138-001 CO 19200 H HBH YYYY 3R DURING CABLE PULLS, FISH TAPE, itUD, T50039 REPORT DIRT (WATER) IS LEFT Ill THE CONDUIT.

PULLING HOOKS GET JAHHED AND ARE L EFT IN C0llDUIT. QC & CRAFT SUPERVIS OR ARE INVOLVED.

IN 201-003 CD 19200 N HBN YYYY SR TOO MAllY DEllDS IN I" C0llDUIT RUti Ill T50157 REPORT UNIT I REVERSE OSHOSIS ROOH ELEV. 75 7' AT 4-V.

THERE HERE ilo FITTINGS U SED 10 RUN THIS CONDUIT ttAKING IT EX TREMELY DIFFICULT AllD TIllE CollSUllING TO PULL CABLE THROUGH THIS C0ilDUIT.

CI STATED TilAT FITTIllGS Ill LIEU OF BENDS SHOULD HAVE BEEll USED 10 FACI LITATE CADLE PULLS. C0ilSTR. DEPT. C ONCERH. NO FOLLOH UP REQUIRED.

• IN 341-001 CD 19200 N HBN. Y'Y Y-Y.

SR FLEXIBLE STAINLESS STEEL CONDUIT FR0 T50189 REPORT '

M VARIOUS EQUIPHENT AND PEllETRATIOils INSIDE THE CollTAINNEllr IS NOT TORQU

. L

.c TACHMENT POINTS.

QC ACCEPTED THE H0 ED Ell 0 UGH AT THE FLEX AFID FITTIllo AT RK.

STAlflLESS STEEL FLEXIBLE CONDUI T CAN BE PULLED APART AFTER Deltic AC CEPTED BY QC.

ALL PENETRATI0llS AND ELECTRICAL EQUIPHENT INSIDE CONTAlllft ENT.

UllIT I & 2 ARE AFFECTED. C0il5 TRUCTI0li C0tlCERN. CI HAS 110 ADDITIO HAL INFORMATI0fl.

IN 512-002

'CO 19200 H HBH Y Y Y Y

Sg UUiT 2 CollDUIT FITTINGS RECEllTLY ISS T50046 REPORT UED TO THE FIELD (TRADE NAHE "ERICKS

^

ONS'") ARE OF IllFERIOR MATERIAL (SIM

'9 ILAR TO PENTER). IllFERIORITY IS PAR TICULARY EVIDEllT IN THE INTERNAL THR EADED AREA, HHERE THREADS ARE ROUGH AND FLATTEllED. PER DIRECTION OF FOR EMAH (ilAME KN0llil) CRAFT (DISCIPLINE KH0HN) ARE REQUIRED TO UtlDERCUT EXTE RNAL THREADS Oil CONDUIT TO ALLOW USE EXPRESSED ON 3/4", I" AND I I/2" SIZES. HD FURTHER SPECIFICS ARE AVA ILABLE.

IN 512-003 CD 19200 N HBH YYYY T50046 REPORT 5$1 CONDUIT RECENTLY ISSUED TO FIELD FOR USE DH UNIT 2 EXHIBIT A flVMBER OF P i

, IECES IIITH RIDGES APID BURHS Ill THE I

'..,_8 NSIDE DIAMETER. THE POTENTIAL EXIST S FOR HIRES 10 BE DAMAGED, IF CRAFT PERS0ilNEL HAD fl0T ll0TED THESE DISCRE P AtlCI ES. NO SPECIFIC SIZES OR LOCAT IONS ARE AVAILABLE.

IN 856-004 CO 19200 N HBN YYYY

.5A C0ilDUIT HAS AS !!AtlY AS FIVE 90 BEllDS T50094

• REPORT IN SOME INSTANCES AllD CABLE CAllll0T BE PULLED. (ilAtlES KNOHN TO QTC AllD RELEASE OF THIS INFORilATION ll0VLD JE OPARDIZE CI's C0liFIDENTI ALITY)... Il0 MORE DETAILS AVAILABLE. HD FOLLOH U P REQUIRED.

4 t

CH -851007-008 CO.

15100 S HBH YYYY SR" HATTS DAR HAS HAD TOO itANY IllSTAllCES T50224 CO, 19200 REPORT OF UNCRAFTSHAft-LIKE ELECTRICAL HORK INCL UDING POORLY BENT AllD INCat1PL E TELY SCREHED T00 ETHER CONDUIT (AUXIL IARY DLDG), AllD CABLES dalla 0ED DUE T D STAG FROM llELDIllG OPERATIONS OVERH EAD (TURDIHE DLDG, EL EV. '7 29 '). Il0 SPECIFIC LOCATIOllS OR UNIT HUMBERS K

'8 HOWN.

CONSTRUCTION DEPT. C0tiCER!l.

I CI HAS NO FURTHER INFORMATI0H. NO F OLLOH UP REQUIRED.

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