ML20212J545
| ML20212J545 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 01/14/1987 |
| From: | Mcnutt G, Russell J, Nirodh Shah TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20212J485 | List: |
| References | |
| 223.1(B), 223.1(B)-R01, 223.1(B)-R1, NUDOCS 8701280229 | |
| Download: ML20212J545 (15) | |
Text
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' * . TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM
- REPORT TYPE: SEQUOYAH ELEMENT REVISION NUMBER: 1
(
TITLE: INSTRUMENT SUPPORT DESIGN Instrument Line Support Connections PAGE 1 0F 14 REASON FOR REVISION:
- 1. Incorporated TVA Line Organization's and SRP's comments. Added chronology, corrective action, and CATD list.
PREPARATION \
1 PREPARED BY:
yl)JSU YL $,Wb vaih t l i-w v 4 DATE SIGNATURE (
_ REVIEWS REVIEW COMMIT k fjf 12.~bi-R&
/
. .A pATURE~ ') DATE TAS 8 .
(p gfflj ga e/ajf7 bh 4 SIGNATURE I-il-87 DATE CONCURRENCES ,
?/, L [ AL /-C-97 CEG-H: /2)W /-6 f 7 SRP:k I. /- / Y- 87 SIGNATURE DATE ( SIGNATURE
- DATE )
APPROVED BY: .
Ok?' k hlDATE/[l N/A MANAGER OF NUCLEAR POWER DATE i ECSP FANAGER CONCURRENCE (FINAL REPORT ONLY) ,
- SRP Secretary's signature denotes SRP concurrences are in files.
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A
TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 2 0F 14
- 1. CHARACTERIZATION OF ISSUES:
Concerns: Issues:
PH-85-054-001 a. The notes on the 47A050 series "The notes on the 47A050 series drawings for typical supports drawings were really confusing describing sizes, numbers, and types to the Q.C. inspection personnel. of instrument line support Much confusion existed between connections were confusing to the size, number and type of QC inspection personnel.
instrumentation support clamps which were acceptable by the b. Bolts for instrument line clamps 050 series notes and what type were not torqued before 06/01/85.
clamp was called for on the i typical support drawing. . . ." c. The bolts were over-torqued to 6 I f t-lb. af ter 06/01/85 causing IN-85-398-002 damage to clamps.
" Inconsistent hanger torquing:
until 6-1-85 no instrumentation d. Forty percent of clamps failed hanger bolts were torqued. From random inspection (possibly 80 that date, bolts were required visually examined).
to be torqued to 6 ft.lb. This amount of torque flattens half e. The new requirement is for bolts to be moon clamps and damages clamp hand-tightened followed by a half-turn nose. 3-4 months ago, hanger with wrench. This may be inadequate.
inspectors randomly inspected unknown [ number] of bolts and f. The torque requirements for Unit 1 40% failed (possibly 80 tested). are different from those for Unit 2.
CI questions corrective action for 10-20 thousand not tested.
New 050 notes (early July '85) permits handtightening then turning 1/2 turn with wrench.
But this can leave the tubing loose. (Both Units). . . ."
IN-85-?98-003
" Bolts for Unistrut Clamps were not required to be torqued prior to 6-1 -85, Unit #1. Unit #2 bolts have an option to be terqued to 6 ft lbs. Half moon clamps l flatten during a Eft. lb. torque.
If torquing is an option on Unit
- 2, why wasn't it an option on Unit #1, and when should the option be applied? CI knows that this was not a procedural require-ment on units. . . ."
j 01OED - 12/31/86 l
- - TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1
( PAGE 3 0F 14
- 2. HAVE ISSUES BEEN IDENTIFIED IN ANOTHER SYSTEMATIC ANALYSIS? YES X NO Identified by TVA Nonconformance Report, 02/22/83, NCR SON SWP E305 Honconformance Report, 12/10/85, NCR WBN 6084, Rev.1 Significant Condition Report, 12/13/85, SCR WBN 6084-S, Rev. O Significant Condition Report, 02/20/86, SCR SON CEB 8612 CAC Engineering Report, 06/03/86, SCR SQh CED 8612 SON Operating Experience Review, 06/23/86, NCR WBN 6084 Construction Category Report, 10/02/86, C017303-SON, R1
- 2. DOCUMENT NOS., TAG NOS., LOCATIONS OR OTHER SPECIFIC DESCRIPTIVE IDENTIFICATIONS STATED IN ELEMENT:
47A050 series drawings and notes were specifically identified and 47A051, 47A052, and 47A054 series drawings were inferred. Howeve r, no specific area was referenced. The issues in question are general and address instrument line clamps.
4 INTERVIEW FILES REVIEWED:
The interview files for the three concerns of Section 1 were reviewed on 10/08/80 as indicated by RFI SON #f 22 (10/08/86). The files contain only the K-forms.
- 5. DOCUMENTS REVIEWED RELATED TO THE ELEMENT:
See Appendix A.
- 6. WHAT REGULATIONS, LICENSING COMMITMENTS, DESIGN REQUIREMENTS OR OTHER APPLY OR CONTROL IN THIS AREA?
See Appendix A. ,
- 7. LIST REQUESTS FOR INFORMATION, MEETINGS, TELEPHONE CALLS, AND OTHER DISCUSSIONS RELATED TO ELEMENT.
See Appendix A.
l 0102D - 12/31/86
- < TVA OMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 I PAGE 4 0F 14
- 8. EVALUATION PROCESS:
- a. Obtained ar.d reviewed the notes on 47A050 series drawings and typical support drawings (both civil and electrical / instrumentation) for approved and qualified sizes, numbers, and types of clamps for instrument lines.
- b. Determined that Unistrut clamp series P2008-P2012 or other manufacturer equivalent was used on SQN.
- c. Determined clamp installation requirements.
- d. Obtained and reviewed previous revisions of above documents for evidence of changes in requirements.
- e. Reviewed calculations and test results to ensure that the design supports the drawings.
- 9. DISCUSSION, FINDINGS, AND CONCLUSIONS:
The discussion, findings, and conclusions in this section address engineering-assigned issues of instrument line clamps. The same subject, but for other concerns covering construction-assigned issues is covered in Construction Category Report Number C017303-SQN. The construction report also covers a new issue of missing clamps identified in March 1986. This report defers to the Construction Category for resolution of the issue.
Chronology o Unauthorized Clamps 05/85: TVA identified the issue at WBN 10/85: TVA identified the issue as a potential generic condition 11/85: Concern was submitted to TVA 03/86: SCH - Reg. Licensing started to review C6/86: SCN - Reg. Licensing reviewed only P2911 clamp 06/86: TVA - GCTC issued their report 010?D - 12/31/86
"*
- TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 5 0F 14 o Clamp Bolt Torque 02/83: TVA-SQN DNE identified lack of torque C6/85: The concerns were submitted to TVA 02/86: TVA-SQN DNE again identified lack of torque 03/86: TVA-WBN identified high torque 04/86: TVA-SQN started a sampling program 05/86: New torque requirements were issued 06/86: TVA-SQN completed evaluation of samples and committed to long-term bolt tightening program Discussion:
NRC General Design Criterion 2 requires Category I structures, systems, and components to be designed to withstand the effects of earthquakes. SQN commitment to comply with this criterion as applicable to instrumentation and controls is given in FSAR Section 3.2 and design criteria SQN-DC-V-3,0, SQN-DC-V-13.7, and SQN DC-V-24.1. As a result, ANSI B31.7-1969, Nuclear Power Piping, Part 6, Paragraph 1-722.3 governs design of all Category I instrument piping and fittings.
The first issue listed in Section 1 states that because of confusing information in 47A050 series drawings, Construction used unqualified clamps to support Category I and 1(L) instrument lines.
TVA discovered this problem at WBN in May 1985 ( App. A, 5.d);
Unistrut P2911 clamps were used to support 1/2-inch diameter instrument lines without authorization from DNE. This resulted in WEN NCR 6084, Rev. O. Further investigation identified a total of 17 types of unauthorized clamps in the warehouse and resulted in the generation of WBN NCR 6064, Rev.1 and a generic Significant Condition Report (WBN SCR 6084-S) in December 1985.
- At SON, engineering drawings (47A050 series) specified seismically qualified clamps to support instrument lines in a variety of l conditions but did not specify the unauthorized clamps identified l at WBN. Subsequent actions taken at SQN and observations related to this issue are described as follows
- i. SQN Engineering forwarded the memo requesting the generic condition evaluation to H. Rankin of NUC PR on 11/20/85 ( App.
l A, 5.d) to determine if this condition existed at SQh. The l apparent reason was to ascertain that the unauthorized clamps had not been inadvertently installed by CC/NUC PR. The SON NUC PR response to address the SCR is still being
, reviewed by TVA at the time of this evaluation report i investigation.
l i
l 01020 - 12/31/86
- TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 6 0F 14
- 11. The Regulatory Licensing Section of SQN requested Power Stores to review WBN NCR 6084 in March 1586. Power Stores did not find any P2911 clamps but did find two types of unauthorized clamps (total of 75) in their warehouse. In its response, Power Stores solicited recommended disposition of the unauthorized clamps. Regulatory Licensing Section perfonned Operating Experience Review in June 1986 but only addressed P2911 clamps to state that they were not found at SQN, and did not then address the disposition of the 75 clamps (App. A, 5.1). The evaluation team concludes that the investigation was incomplete since it has neither. covered the potential installation of the 17 types of unauthorized clamps during the period when instrument tubing was being installed by Construction, nor has it addressed potential installation by NUC PR of the two types of unauthorized clamps, iii. The evaluation team reviewed all SQN NCRs (2518 through 3001) covering the period 01 / 0 5 / 81 through 02/El/85. The team did not find an NCR identifying any unauthorized clamp installation ( App. A, 5.n).
iv. In response to SCR SQN CEP 8612, TVA DNE undertook a sampling program at SQN in April 1986 to determine torque of the installed bolts. They took a random sample of 120 instrument line clamps ( App. A, 5.j). The evaluation team reviewed the sample results and did not identify any unauthorized clamp. l Furthermore, the torque inspection program, as described later, requires that if NUC PR finds any unauthorized clamps, they must be replaced by approved clamps. These activities adequately assure that the clamp installation at SQN meets design requirements. l
- v. A few drawings in the 47A051, 47A052, and 47A054 series have a "Unistrut P2000 series" callout for instrument line clamps. The Unistrut series has many clamps which do not l have any torque value specified on Drawing 47AC50-17; therefore, a revision is required to specify only clamps with the defined torque values. TVA DNE has agreed to replace the broad range of clamp callouts with specific designations to ensure use of specified clamps and torques value:, ( App. A, 7.f).
010?D - 12/31/06 1
T
- TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 7 0F 14 vi. TVA SON Generic Concerns Task Group (GCTG) also reviewed concern PH-85-054-001 in June 1986 and concluded that the concern about 47A050 series drawing notes being confusing was not valid for SQN since "There are only 56 general notes at SQN cotilpared to 181 at WBN" ( App. A, 5.m). The fewer notes '
at SON made their correct interpretation easier and implementation possible. GCTG also interviewed seven QC Inspectors, their supervisors, and the cognizant design engineers for the 47A050 series drawings and concluded that
"[they] generally agree that each time a problem arises, it is resolved satisfactorily."
The evaluation team concurs with this finding that 47A050 series drawings and notes at SQN are not confusing for instrument tubing clamps. Therefore, SQN Construction and QC should not have had difficulty in interpreting and implementing the requirements.
Issues "b," "c," and "d" of Section 1 pertain to torque requirements for certain types of clamps and the potential damage to clamps caused by the specified torque.
During a field inspection of instrument lines on WBN Unit 1, TVA discovered that several instrument lines and their supports were damaged because of high torque. This resulted in TVA initiating a Problem Identification Report (PIR) in March 1986 to resolve the condition of damaged clamps and improper torque. SON evaluated the PIR for its generic application and concluded that SQN has similar single-hole clamps, i.e., Unistrut P2008 series, but did not have clamps damaged by over-torquing (App. A, 5.g).
SON design documents originally did not specify any bolt tightening requirements for Unistrut type fittings. In February 1983 an SQh NCR was issued describing this condition, followed by SCR S(N CEB 8612 in February 1986. The latter SCR described the condition as follows: " . . .the lack of specific tightening instructions could cause non-high strength bolt connections to be unqualified." The SCR dealt with mechanical piping and electrical conduit as well as with instrument line clamps. However, this element report is limited to instrument line clamps.
A random sample was taker, on Unistrut type clamp bolts to determine as-installed torque. A total of 120 clamps covering one-hole clamps (Unistrut P2008 Series) and two-piece clamps (Unistrut P2024 series) were checked at various locations throughout the plant.
TVA's Singleton Laboratory tested clamps to establish bolt torque vs load capacity curves. SON performed an engineering evaluation and concluded that, based on the actual torque, as-built
, 0102D - 12/31/E6
'. .- TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 8 0F 14 installation could support the instrument lines during a postulated SSE event without exceeding the code allowable loads for all of the sample cases. The evaluation team reviewed the calculation for its assumptions, collection of data, logic, analysis, and conclusions.
The team considered them properly done. Based on this evaluation calculation, SON did conclude ( App. A, 5.1 and 5.j) that the instrument lines were acceptable for restart.
Since some instrument lines carry fluid and are subject to thermal expansion and contraction, SQN established a 100 percent inspection requirement under a long-term bolt tightening maintenance program to assure proper installation of all seismic Category I and I(L) instrument line clamp bolts ( App. A, 6.e). Design drawings were also revised to specify tightening and inspection requirements for all installations effective 05/19/86. Construction Specification N2C-946 was issued defining requirements for tightening non-high strength bolts.
Section IVB of Construction Category Employee Concerns Report No.
C017303-SQN ( App. A, 5.0) has identified the sample size for instrument line clamps for SCR SQN CEB 8612 as 163. However, the excess number over 120 covers small-bore process piping clamps (App. A, 7.h).
Issue "e" of Section 1 questions the new tightening requirement.
This requirement was substantiated in laboratory tests ( App. A, 5.h) and for P2008 clamps yielded torque between 1.2 to 2.2 ft-lb.
This amount of tightening met the design requirements and precluded clamp damage.
The last issue in Section 1 states that torque requirements for Unit 2 were different from those for Unit 1. This issue was examined and the evaluation team verified that both SQh Units originally had no torque requirements and now have specific identical torque requirements for instrument line clamps.
Findings:
The alphabetic identifiers listed below correspond to the list of l issues in Section 1. i
- a. The notes on the 47A059 series drawings are not confusing for SQN instrument line suppcrt connections.
- b. Instrunent line clamps were not torqued before 06/01/85; however, the TVA bolt tightening program under specification No. N2C-946 issued 06/25/86 establishes torque requirements.
01020 - 12/31/P6
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TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 9 0F 14
- c. SON did not specify a 6 ft-lb value of torque for single-hole clamps. Thus, bolts were not overtorqued after 06/01/85 and clamps were not damaged because of torquing.
- d. In the sampling program, a high percentage of clamps were found to have bolts nihich turned at less than the presently prescribed torque, although the clamps could support the tubing. Moreover, the bolt tightening program undertaken by TVA addresses the issue by assuring adequate bolt installation to meet design loadings for seismic Category I and I(L) instrument line supports.
- e. The new bolt tightening requirement has been verified.
Drawing 47A050-17 defines the requirements, and tests ensure the installation's meeting the design requirements.
- f. Once the torque requirements were established for SQk, they have been identified for both units.
- g. The documented evidence for the SQN response to WBN SCR 6084-S dated 12/13/85 identifying 17 types of unauthorized y ' Unistrut clamps is being completed by TVA.
- h. A few drawings in the 47A051, 47A052, and 47A054 series have a broad range of clamp callouts that need to be replaced with specific designations.
Conclusions :
- a. The evaluation team concludes that the concern
( PH-85-054-001 ) regarding the use of unauthorized clamps is not valid for SQN Seismic Category I and I(L) instrument line supports. Based on its review of the walkdown surveys by TVA, the evaluation team concludes that there is adequate assurance that unauthorized instrument line clamps have not been used. The other two cor.cerns (IN-65-398-002 and IN-85-398-003) dealing with inconsistent bolt torgt.e are technically valid but are being properly addressed and will be closed by the TVA bolt tightening program that resulted from the systematic analysis of SCR SON CEB 8612.
- b. The SQN NUC PR response to address the generic SCR for potentially inadvertent installation of unauthorized Unistrut clarps is now under review by TVA.
010?D - 1?/21/86
- TVA EMPLOYEE CONCERNS REPORT NLMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NIMBER: 1
( PAGE 10 0F 14
- 10. CORRECTIVE ACTION:
To comply with the design requirements, TVA has committed to the following corrective action plan (CAP) (TCAB-Oli and 050, App. A, E.p).
- a. A review of the WBH SCR 6084-S based on the SON construction contract records recently indicated that some of the unauthorized clamps were also received at the SQh site.
blever, the results of the samples taken in April 1986 did not identify any unauthorized clamps. Therefore, there is a high probability that the unauthorized clamps were not used for Category I instrument piping. Furthermore, under the long-term torque inspection program (Engineering Change Notice 6690), TVA will replace all unauthorized clamps, if any, with approved clamps,
- b. TVA will tighten originally installed Unistrut bolts for instrument line clamps under the program described in Engineering Change Notices 6690 and 67S1. This action will assure adequate bolt installation.
- c. TVA will revise those drawings in the 47A051, 74A052, and 47A054 series with a broad range of Unistrut clamp callouts with the specific approved clamp designations.
TVA's CAP as described will meet its FSAR commitment for the Category I instrument tubing clamps at SQN. The evaluation team, therefore, concludes that the stated CAP is an acceptable resolution of the concerns and should also preclude their recurrence.
l 010?D - 12/31/86
TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 110F 14 APPENDIX A
- 5. DOCUttENTS REVIEWED RELATED TO THE ELEMENT:
- a. TVA SQN Drawings - Seismic Class I Structures o 47A050 - 1 (R2 through 7) Mechanical Hanger Drawing General Notes 1A (RO)
- 2 (R1 through 6)
- 2A through 23A (Revisions as of 8/24/86) o 47A051 - Series (Revisions as of 8/24/86) tiechanical Seismic Supports - Instrument Sensing Lines o 47A052 - Series (Revisions as of 8/24/86) Mechanical Seismic Supports - Radiation Monitoring and Sampling o 47A054 - Series (Revisions as of 8/24/86) Mechanical Seismic Supports - Control Air Lines
[B25 860515 515]
- c. TVA memo from R. O. Barnett to J. P. Yineyard, "NCR SQN SWP 8305 - Bolt Tightening Requirements," [B41 851009 001]
(10/09/85)
- d. TVA memo from J. P. Vineyard to H. B. Rankin, "SQN Potential Ceneric Condition Evaluation," [B25 851120 006] (11/20/85)
, e. TVA memo from J. C. Standifer to G. Wadewitz, "WBN hon-ASME Significant NCR 6084 R1 and SCR 6084-S R0," [B26 860121 128]
( 01 / 21 /8 6)
- f. TVA memo from R. O. Barnett to J. P. Vineyard, "SQh SCR SQN CEB 8612 Specific Bolt Tightening Instructions,"
[B41 860220 005] (02/19/86) i 0102D - 12/31/86
- - TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 12 0F 14
- (
APPENDIX A (Cont'd)
- g. TVA memo from C. N. Johnson to R. O. Barnett, " Potential Ceneric Condition Evaluation - WBN PIR WBN CEB 8639 -
Overtightening of Unistrut Type one-hole Tube clamps," [B25 860626 001 ) (06/25/86)
- h. TVA memo from J. A. Raulston to R. O. Barnett, "SQN Unistrut' one and two-piece Tubing Clamps with stainless steel tubing,"
[B46 860612 001] (06/16/86)
- j. memo from R. E. Field, Jr. and W. J. Kagay to SQN Er gineering Project Files, "SQN SCR SQN CEB 8612 - Technical Justification for Bolt Tightening Recommendations,"
[B25 860815 019] (08/15/86)
- k. TVA DNE Calculations " Tightening of Non-High Strength Bolted Connections for Conduit, Piping and Tubing," SOCG 1006'
( [B25 861021800]
V'." ' TVA SQN Operating Experience Review Evaluation Form for WBN r l.
HCR 6084, (06/23/86)
- o. TVA letter to Bechtel (TLB-044), "WBN-Employee Concerns Evaluation Program - Job 16985-026" [U10 861010 601),
(10/10/86)
- p. TVA letter from G. R. McNutt to G. L. Parkinson, " Employee ;
Concern Evaluation Program - SQN Restart Program - Corrective Action Plan," TCAB-011, (11/24/86) and TCAB-050, (12/31/66)
- 6. WHAT REGULATIONS, LICENSING COMMITMENTS, DESIGN REQUIREMENTS OR OTHER APPLY OR CONTROL IN THIS AREA?
- a. SCN FSAR update through klendment 3, Section 3.2, " Classification of Structures, Systems, and ,
Components" t
01020 - 12/31/86
~
- TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 13 0F 14 APPENDIX A (Cont'd)
- b. -TVA SON Design Criteria "The Classification of Piping, Pumps, Valves, and Vessels," No. SQN-DC-V-3.0, Rev. 2
- c. TVA SQN Design Criteria, " Alternate Piping Analyses and Support Criteria for Category I Piping Systems," No.
SQN-DC-V-13.7, Rev. 2
- d. TVA SQN Design Criteria, " Location and Design of Piping Supports and Supplemental Steel in Category I Structures,"
No. SQN-DC-V-24.1, Rev. O
- e. TVA SQN Construction Specification, " Requirements for Tightening of Non-high Strength Bolts in Friction-type Connections," No. N2C-946, Rev. O
- f. TVA Civil Engineering Branch, " Design Data for Support of Category I Stainless Steel and Copper Tubing," No. CEB 75-9, Rev. 1
- 7. LIST REQUESTS FOR INFORMATION, MEETINGS, TELEPHONE CALLS, AND OTHER DISCUSSIONS RELATED TO ELEMENT:
- b. BLT 037 (09/05/86)
- c. RFI SON #542 (09/09/86)
- e. Telephone call from N. Shah (Bechtel) to R. Meaders (TVA),
IOM 267 (09/18/86)
- f. Telephone call from N. Shah (Bechtel) to L. Katcham and R.
Field, Jr. (TVA), IOM 285 (10/02/86)
- b. Telephone call from N. Shah (Bechtel) to V. Clemmer III (TVA), IOM 317 (10/15/86)
C102D - 12/31/86
TVA EMPLOYEE CONCERNS REPORT NUMBER: 223.1 (B)
SPECIAL PROGRAM REVISION NUMBER: 1 PAGE 14 0F 14 CATD LIST The following CATDs identify and provide corrective actions for the findings included in this report:
223.01 SON 01 (12/29/86) 223.01 SQN 02 (11/20/86) 223.01 SON 03 (11/20/80) v.
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I 01020 - 12/21/86
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REFERENCE - ECPS120J-ECPS121C TENNESSEE VALLEY AUTHORITY PAGE .
104-FREQUENCY - REQUEST OFFICE OF NUCLEAR POWER RUN TIME - 12:57:19 ONP - ISSS'- RHM- EMPLOYEE CONCERN PROGRAM SYSTEM (ECPS)- RUN DATE - 12/02/86-F LIST OF EMPLOYEE CONCERN INFORMATION l CATEGORY: EN DES PROCESS & OUTPUT SUBCATEGORY: 22301 INSTRUMENT SUPPORT CONNECTIONS
$ S GENERIC KEYHORD A l H APPL QTC/NSRS P KEYHORD B CONCERN SOB R PLT B3SH INVESTIGATION S CONCERN .KEYHORD C "
! KEYHORD D j 3 HUMBER CAT CAT D LOC FLQB REPORT .R DESCRIPTION IN 398-002 EN 22301 N HBN YYYY SR INCONSISTENT HANGER TORQUING 'UNTIL EXAMINATION i T50098 REPORT 6-1-85 NO INSTRUMENTATION HANGER BOL CORRECTIVE ACTION 1
TS HERE TORQUED. FROM THAT DATE, BO' HANGERS i LTS HERE REQUIRED TO BE TORQUED TO 6 BOLTING j
i FT LB. TI:IS AMOUNT OF TORQUE FLATT-1 ENS HALF MOON CLAMPS AND DAMAGES CLA MP NOSE. 3-4 HONTHS AGO, HANGER INS PECTORS RANDOMLY INSPECTED UNKN0HN O F BOLTS AND 40% FAILED (POSSIBLY 80 TESTED). CI QUESTIONS CORRECTIVE AC '
TION FOR 10-20 THOUSAND NOT TESTED.
NEN 050 NOTES (EARLY JULY '85) PERM ITS HANDTIGHTENING THEN TURNING 1/2 l
TURN HITH.HRENCH. BUT THIS CAN I IN 393-003 EN 22301 N HBN YYYY SR BOLTS FOR UNISTRUCT CLAMPS HERE NOT SPECIFICATIONS
-l T50096 REPORT REQUIRED TO BE TORQUED PRIOR TO 6-I- DESIGN RELATED -!
85, UNIT SI. UNIT 82 BOLTS HAVE AN HANGERS ,
OPTION TO BE TORQUED TO 6 FT. LBS. BOLTING l i HALF MOON CLAMPS FLATTEN DURING A 6F i T. LB. TORQUE. IF TORQUING IS AN OP J TION ON UNIT 82, NHY HASN'T IT AN OP 4
TION ON UNIT el, AND HilEN SHOULD THE l
> OPTION BE APPLIEDT CI KNONS THAT T >
! HIS HAS NOT PROCEDURAL REQUIREMENT 0 -7 N UNITS. CI HAS NO MORE INFORMATION
. NO FOLLOH UP REQUIRED.
1 4 PH 054-001 EN 22301 N HBN NNYY SR THE NOTES ON THE 47A050 SERIES DRAHI DRAHINGS i T50207 K-FORM NGS HERE REALLY CONFUSING TD-THE Q.C HONCONFORMANCE
! INSTRUMENTATION l
. INSPECTION PERSONNEL. MUCH CONFUS ION EXISTED BETHEEN THE SIZE, NUMBER SUPPORTS AND TYPE OF INSTRUMENTATION SUPPORT CLAMPS HHICH HERE ACCEPTABLE BY THE 4 050 SERIES NOTES AND HHAT TYPE CLAM P HAS CALLED FOR ON THE TYPICAL SUPP 3
4 ORT DRAHING. CONSTRUCTION DEPT. CON - ,
CERN. UNIT 1. CI COULD NOT PROVIDE.
1 ANY SPECIFICS / DETAILS. NO FURTHER INFORMATION AVAILABLE.
3 CONCERNS FOR CATEGORY EN SUBCATEGORY 22301 i
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