ML20132C755

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Approves Regions I & IV Final Draft Insp Repts Re Structural Steel Welding.Adequate Steps Taken to Insure Integrity of Weldments.Issue Considered Resolved
ML20132C755
Person / Time
Site: Wolf Creek, 05000000
Issue date: 03/04/1985
From: Liaw B
Office of Nuclear Reactor Regulation
To: Youngblood B
Office of Nuclear Reactor Regulation
Shared Package
ML20132C642 List:
References
FOIA-85-161 NUDOCS 8503080476
Download: ML20132C755 (26)
v • d • e


Text

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MAR 4 1985 .

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4 Docket No. 50-482 h MEMORANDUM FOR: B. Joe Youngblood, Chief Licensing Branch #1 Division of Licensing FROM: B. D. Liaw, Chief .

{

Materials Engineering Branch Division of Engineering

SUBJECT:

REVIEW 0F REGION IV AND REGION I FINAL DRAFT INSPECTION REPORTS OF WOLF CREEK STRUCTURAL STEEL WELDING The Materials Engineering Branch, Division of Engineering, has reviewed Regicn I and Region IV draft inspection reports on Wolf Creek structural steel welding. We find the reports adequately cover the subject and that our comments were appropriately reflected in the final drafts.

We also believe the Region IV report is consistent with our review of the applicant's submittal dated February 18, 1985. We agree with the conclusions of the reports and believe that reasonable and adequate steps were taken to assure the structural integrity of these steel e weldments. We consider the issue resolved.

B. D. Liaw, Chief Materials Engineering Branch Division of Engineering cc: H. Denton E. Sullivan D. Eisenhut 5. Pawlicki H. Thorpson 3 O'Connor J. P. Knight C. Y. Cheng R. Denise, Region IV W. Hazelton T. Novak R. Klocker i'

W. Johnston WithS g ntact: [E~ Smith s X-24553 K g 3tsgoyvP & '%e-DISTRIBUTION:

R s 1 MTEB Wolf Creek F*les

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iaw  :

NAME :D. Smith,

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3/ @ /85 DATE : 3/4/85  : 3/ /85 OFFICIAL REC RD COPY

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i u- 9-af Ifg The threshold for the acceptance of weld deviations from the requirements of AWS D1.1 is :

1 All weld deviations which result in a violation of the design allowable stresses'specified in the SNUPPS Civil-Structural Design Criteria 10466-C-0 are unacceptable and the weld will be repaired.

Missing welds and missirig portions of weld (greater than 1 inch nominally) are unacceptable regardless of the stress levels in the joint and the welds will be installed unless specifically approved otherwise by the engineer.

Defects (cracks, lack of fusion, undercut, etc.) which jeopardize the integrity of the joint a e unacceptable and will be repaired. The engineer will perform a case by case review of each weld inspection report in order to identify those defects which require repair.

Two generic exceptions to the requirements of AWS D1.1 are allowed by Bechtel Specifications 1046t-C-122 (Erection of Structural Steel) and 10466-C-132 (Erection of Miscellaneous Metal):

Undercut shall not exceed 1/32 inch.

Fillet welds need not sattsfy the convexity limitations of ASW D1.1, Section 3.6.1 provided that all other parameters of acceptable weld profile are maintained.

Becntel Specifications 10466-C-122 and 10466-C-132 also provide the following clarifications and interpretations of AWS D1.1 requirements:

Fillet welds shall be specified size witn full throat and legs of uniform size as defined by Section 8.15 of AWS D1.1. Oversize of welds shall be

. minimized as much as practical, and in no case shall exceed 100 percent or 3/8 inch greater than specified, whichever is less.

Unequal leg fillets are acceptable provided the smaller leg meets or exceeds tne minimum specified requirements.

Continuous welds are acceptable in place of intermittent welds.

Field Change Request 1-0076-W provides the following interpretation of AWS D1.1:

Tne limitation in AWS D1.1-75, paragraph 2.7.1.2(2), on the maximum size of a fillet weld along edges of metal 1/4" or more in thickness, is intended for design purposes only. It is not intended as a limitation on the amount of weld deposited in the field and should not be used as a weld insehtion criteria. The maximum weld size for inspection purposes ~

is governed by paragraph 3.1.4 unless otherwise noted on design drawings -

or in design specifications.

Welds which conform to AWS D1.1 tne three previous paragraphs are not reported as rejectable by the ongoing reinspection program and no case-by-case evaluation of these weld attributes is being performed.

_ _ \\~%-b'4t r Structurally significant joints are field welded joints which support or ~

potentially support safety related equipment and building components. These joints are identified on the structural steel (American Bridge Company) and miscellaneous steel (Cives Steel Company) erection detail and field work drawings, and Bechtel detail drawings (C-0X drawing series). The locations and details of field welded joints required for the erection of the structural and miscellaneous steel in the Wolf Creek plant are shown on these drawings.

The structurally significant joints includes all field welded joints with the exception of:

t

1. handrails
2. toeplates
3. grating 4 checked plate
5. stairs and supporting stee'l
6. ladders -
7. monorails
8. temporary construction welds o

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/ Ob-4Anwf h The reported conditions although not desirable from a design standpoint, do not detract from the structural integrity of the structural beam or the connection. Since the beam flanges are not restrained (as in a moment connection) the end fixity is not established by the presence of additional weld. Some minor partial fixity may result above that provided by a properly welded connection, but this is judged to have minimal effect on the behavior of the connections, especially in the majority of cases where a composite concrete slab is provided.

Local deformations may develop at the connection to allow for end rotation of the beam but this is considered acceptable.

Therefore, the reported conditions are acceptable to use-as-is.

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ALLEGATION REVIEW Date: March 12, 1985 -

CASE NUMBER 4-84-A-015 DATE OPENED 02/07/84 FACILITY NAME Wolf Creek 50-482 1 1

SUBJECT Harrassment of QC Inspectors

SOURCE OF ALLEGATION Employee NUMBER OF ALLEG.

ASSIGNED TO 01 CROSS REF. NO. Q4-84-018 ACTION SCHEDULED OI review FIRST/LAST NAME R. Herr DATE ASSIGNED REPORT NUMBER 1st:

2nd:

lst:

FTS NUMBER 8-728-8100 DUE DATE ALLEGATION SUBSTANT SORT CODE C DATE CLOSED ACTION OFFICE RIV MAN HOURS REPORT PREPARATION ASSIST DETAILS: Mechanical / welding QC inspector was barrassed for writing NCR dealing with improper welding amperage by superintendent. RIV to contact alleger with regard to turning allegation over to licensee for review. 01 has indicated an interest. Report of Inquiry Q4-84-18 issued 4/11/84. KG&E Report provided for 01 review and then returned to Licensee. Supplemental Q4-84-185 issued and closes all 01 interest. Need to contact alleger. Supplemental Q issued by OI on 2/15/85 which closes 01 case. Need to contact alleger.

REFERENCE:

OIR4-84-A-0027.

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DOCLMENT LIST ALLEGATION NO. //- V t/ -8 'TF - /

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M' - h, ALLEGATION REVIEW Date: February 28, 1985 CASE NUMBER 4-83-A-075 DATE OPENED 10/05/83 FACILITY NAME Wolf Creek 50-482 SUBJECT Intimidation of craft

& workmanship problems SOURCE OF ALLEGATION R. Shaneyfelt-sheet-metal worker K. Rowell-Welder NUMBER OF ALLEG. 3 ASSIGNED TO RPS C CROSS REF. NO.

ACTION SCHEDULED Inspection FIRST/LAST NAME W. Johnson DATE ASSIGNED 10/05/83 REPORT NUMBER 1st:

2nd:

Lst:

FTS NUMBER 8-728-8100 DUE DATE ALLEGATION SUBSTANT SORl CODE C DATE CLOSED ACTION OFFICE RIV MAN HOURS REPORT PREPARATION ASSIST DETAILS: Allegation divides into 3 categories:

a. Intimidation
b. unauthorized plug welds
c. overtorqueing of bolts Initial investigation is to be conducted by KG&E with SRI monitoring.

Quality-related allegations appear to have substance (preliminary). KG&E has verbally requested that a copy of their investigation be considered 2.790. KG&E to provide formal letter requesting their investigation report to be considered 2.790. Copy of KG&E investigation report provided to 01 and returned. Report discussed with KG&E on 2/7/84. KG&E final Report is available on site. Combine with 4-83-A-79. 01 onsite 9/19/84 to evaluate KG&E Quality First Program from investigative standpoint. Technical inspection 50-482/84-33 closes out. Alleger to be contacted. Letter sent to Rowell on 2/5/85, returned with no forwarding address. No address for second alleger. OI memo of 2/5/85 to RIV E0 closes 01 interest.

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ALLEGATION REVIEW , Date: February 28, 1985 CASE NUMBER 4-84-A-058 DATE OPENED 06/01/84 FACILITY NAME Wolf Creek 50-482 SUBJECT QA Auditor concerned that i adverse pers. actions taken because of Audit Fd SOURCE OF ALLEGATION . Contractor Employee NUMBER OF ALLEG. 1 ASSIGNED TO RPS "C" CROSS REF. NO.

ACTION SCHEDULED Review Audit Findings and Adverse 01.

FIRST/LAST NAME J. Jaudon DATE ASSIGNED 06/06/84 REPORT NUMBFR lst:

2nd:

Lst:

FTS NUMBER 8-728-8100 DUE DATE ALLEGATION SUBSTANT SORT CODE C DATE CLOSED ACTION OFFICE RIV MAN HOURS REPORT PREPARATION l ASSIST l

DETA!LS: Alleger is concerned that there ;i a conspiracy against hit because .

l he was stepping on toes in his audit findings. He found in his audits that l

' CWP's are used to open code pressure boundaries without QC inspection or meeting code requirements. The alleger was stated by KG&E to have been suspended while he was being investigated (by KG&E). Inspection of technical issues complete and to be issued in Inspection Report 50-482/84-23 (in preparation). Undated memo (R.G. Taylor) to file concludes that allegation could not be substantiated.

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