ML20151Z028

From kanterella
Jump to navigation Jump to search
Rev 0 to Welding Project Employee Concern Evaluation Rept WP-04-BFN, Insp Tools,Browns Ferry Nuclear Plant
ML20151Z028
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 05/11/1987
From: Lewis J, Pate B, Rose J
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20151Z000 List:
References
WP-04-BFN, WP-04-BFN-R00, WP-4-BFN, WP-4-BFN-R, NUDOCS 8808290140
Download: ML20151Z028 (7)
v • d • e


Text

'.

WELDING PROJECT EMPLOYEE CONCERN EVALUATION REPORT INSPECTION TOOLS. BROWNS FERRY NUCLEAR PLANT PREPARED BY [/2 #/[9 WP/ECTG g , , -

REVIEWED BY Jebb FM ., 5/12/S7 DNC/WP REVIEWED BY - -

h Eu, 6 # 7 DNQA e c REVIEWED BY fn-m V k *//N A /2 /2// 9 7 CEG-H, WELDING APPROVED BY (~ A DLL A k Mdo---

C \

PROGRAM MANAGER Report Number WP-04-BFN Revision 0 -

Date 6*lI'09 8808290140 DR 880822 p ADOCK 0S000259 PNU fm 13490

. mm . '.

"- WP-04-BFN REVISION O EMPLOYEE CONCERN

SUMMARY

SHEET INSPECTION TOOLS AT BROWNS FERRY NUCLEAR PLANT I. SCOPE OF EVALUATION This report addresses three employee concerns dealing with inspection tools at Browns Ferry Nuclear Plant (BFN). These concerns were grouped into two issues to aid in the evaluation effort.

A. Welding Inspectors were never issued inspection tools such as weld size gauges and fitup gauges.

B. Prior to 1979 and until recently (past two years) TVA did not provide inspection tools to welding Anspectors.

II. ANALYSIS OF ISSUES ADDRESSED BY CONCERNS

  1. A. The issue of inspectors at Browns Ferry never having been issued f

inspection tools evolved from Watts Bar concerns generically j(, applied to other TVA nuclear sites. This issue is factual at Browns Ferry only to the extent that not all tools, available at the beginning of construction, were commercially procured. Site fabricated tools appropriate to the practice at the time when work was performed were available.

A detailed discussion of this issue is presented in WP-40-BFN, Paragraph III A.

B. The issue that TVA did not supply inspectors tools prior to 1979 and until recently (past two years) evolved from Watts Bar concerns generically applied to other TVA nuclear sites. This issue is not f actual for Browns Ferry. Inspection tools were available at the beginning of constructio'n.

A detailed discussion of th!i issue is presented in WP-04-BFN, Paragraph III B.

III. COLLECTIVE SIGNIFICANCE A. No collective significance is identified in that inspection tools were available at Browns Ferry from the beginning of construction even though these tools may have been site fabricated, and not commercially procured.

13490 page 1 of 2 i

6 ..

WP-04-BFN REVISION O IV. ROOT CAUSE(S)

None. These issues were found to be not applicable at Browns Ferry.

V. CORRECTIVE ACTION No corrective action is indicated.

VI. REINSPECTION REQUIREJ No.

VII. ISSUE CLOSURE Closed.

VIII. ATTACHMENTS

1. Evaluation Report WP-04-WBN, Revision 0.

I(\m 1

l i

13490 Page 2 of 2

WP-04-BFW REVISION 0 WELDING PROJECT EMPLOYEE CONCERN EVALUATION REPORT INSPECTION TOOLS AT BROWNS FERRY NUCLEAR PLANT I. SCOPE OF EVALUATION A. Three employee concerns. Text of concerns is provided under Attachment 1.

The subject concerns originated at Watts Bar Nuclear Plant and wete gernerically applied to Browns Ferry Nuclear Plant (BFN). This evaluation is based on review of the BFN Welding Phase 1 Report, current and superseded process specifications and implementing procedures, and the Weld Project Report WP-04-SQN. Also reviewed were the BFN Corrective Action Reports, Discrepancy Reports and Nonconformance Reports. The American Society of Mechanical Ensinoces (ASME) Boiler and Pressure Vessel Code Section III, The lg- American Wolding Society Structural Code AWS D1.1 and the USA A. Standard For Pressuro Piping USAS B31.1.0 were reviewed and compared with the text of the concerns. The findings prosented herein are based upon review of the above noted documents and interviews with cognizant TVA personnel.

II. ISSUES ADDRESSED BY CONCERN A. Welding inspectors were never issued inspection tools such as weld size gauges and fitup gauges.

B. Prior to 1979 and until recently (past two years) TVA did not Provide inspection tools to welding inspectors.

III. ANALYSIS OF ISSUES ADDRESSED'BY CONCERNS A. One concern implied that welding inspectors were never issued inspection tools.

The American Welding Societcy Structural Welding Code AWS D1.1-72 Section 6, Paragraph 6.5.5 states in part "Size and contour of welds shall be measured with suitable gauges," but does not clarify suitable.

' Other construction codes, specification and procedures, though establishing acceptance criterion for prewold, in-process'and postwold activities, do not refer to how or by what means, those criteria shall be verified.

i 13500 Pago 3 of 2

. <l l

e.- . . .

~

. Wp-04-BFW REVISION 0 Discussion with-cognizant TVA personnel revealed that site fabricated inspection tools such as fillet gauges, hi-lo gauges, undercut gauges, skewed "T" fillet gauges and fitup gauges and commercially manufacturered rulers (pocket scales) and flashlights were available from the beginning of construction. It was indicated that not all inspectors had a full set of tools at all times, however, they were available upon request. Additionally, as construction advanced and as more sophisticated tools such as protractors and multipurpose gauges became available, they were purchased and made available to the welding units. These commercially manufacturered tools were primarily purchased to make welding inspection easier. This does not indicate that the earlier site fabricated tools were not adequate or suitable to perform required inspections.

B. Two concerns implied that prior to 1979 and until recently (past two years) TVA did not provide inspection tools to inspectors.

Further discussion with TVA personnel, one of which was an inspector in 1979, revealed in fact that inspection tools were available and had been for some time. The tools being issued at that time were not only those that had been site fabricated, but those of commercial manufacture. Some of the commercial tools being issued at that time were the Cambridge gauge, pit (undercut) gauges, fillet gauges, hi-lo gauges, fitup gauges, and bevel protractors. It must be noted the Cambridge is a multipurpose gauge that can be used for a variety of purposes such as weld size, reinforcement measurement, effective throat, bevel angle, and internal mismatch.

A set of the inspection tools that were site fabricated were obtained and evaluated for suitability ly en AWS Certified Wolding Inspector and all were found suitable for determining acceptability of established weld criteria.

IV. COLLECTIVE S7.CNIFICANCE No collective significance identified in that suitable inspection tools were available at Browns Ferry from the beginning of construction even though these tools may have been site fabricated and not commercially procured.

V. ROOT CAUSE(S)

None, These issues were found to be not applicable at Browns Ferry.

VI. CORRECTIVE ACTION No corrective action is indicated.

VII. ATTACHMENTS ,

1. Employee concerns.

13500 page 2 of 2 9

-...s

e, . i

  • e . .-

WP-04-BFN REVISION 0 WELDING PROJECT EMPLOYEE CONCERN EVALUATION REPORT ATTACHMENT 1 TEXT OF EMPLOYEE CONCERNS Evaluation Report WP-04-BFN addresses three employee concerns. The text of the concerns is shown on the following page.

IN-85-007-001 IN-85-134-002 IN-85-406-003

.i t-R

?

L l

l 1

l

'l

- --.  :~ -.

. .q: )

REFERENCE - ECPSI32J-ECPS132C 4 FGEQUEllCY - LEQUEST TENNESSEE VALLEY CUTHORITY DNP - ISSS - RIIH CFFICE OF NUCLEAR P0HER PAGE -

)!

RUN TIME - 11:56 ;

EMPLOYEE CONCERN PROGRAM SYSTEM (ECPS) RUN DATE - 85/16e '

CATEGORY: UE UDN QA/QC WELDING EMPLOYEEHPCONCERN- 04 INFORMATION BY CATEGORY /5UBCATEGORY AVAILABILITY OF HELD INSPECTION '400LS i S

H I REPORT APPL SUB R PLT 2 SAF RELATED HISTORICAL CONCERN . REF. SECTI' C0!

___jCERN NUMBER CAT CAT D LOC ' CAT -E' BF BL SQ WB REPORT ORIGIN CONCERN DESCRIPTION- SUBCAT O IN 007-00101 WE 50704 N HBN 1Y Y Y Y T50001 QTC INSPECTION TOOLS FOR HELDING INSPECT 2 SR SR SR SR ORS HERE NEVER ISSUED. I.E. FILLET HELD SIZE GAGES, FIT-UP GUAGES, ETC.

(SQN ISSUES ADDRESSED IN RPT HP SON R2)

IN 134-00201 NE 50704 N HBN 1Y Y Y Y T50050 QTC UNTIL RECENTLY (PAST 2 YEARS), TVA D 2 SS SS SS SS ID NOT PROVIDE QC INSPECTORS WITH WE LDING It.SPECTION TOOLS. SOME INSPEC TORS PROVIDED THEIR OWN TOOLS BUT OT HERS DID NOT. CI HAS PASSED AHAY, N O FURTHER DETAILS AVAILABLE. (SQN IS SUES ADDRESSED IN RPT HP-04-SQN R2)

IN 406-00301 HE 50704 N HBN 1Y Y Y Y T50013 QTC PRIOR TO 1979, NO HELD INSPECTION TO 2 SS $$ $$ SS OLS HERE ISSUED TO INSPECTORS. CSQN ISSUES

) ADDRESSED IN RPT HP-C4-SQN R2

~

3 CONCERNS FOR CATEGORY HE HP - 04 CCNCERNS ARE GROUPED BY LAST 2 DIGITS OF SUBCATEGORY NUMBER.

.~ ..

G

-

Retrieved from "https://kanterella.com/w/index.php?title=ML20151Z028&oldid=2961290"