ML20236L658
| ML20236L658 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/12/1998 |
| From: | Howe A NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Oconnor S, Sturz F NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20236J176 | List: |
| References | |
| FOIA-98-164 NUDOCS 9807130113 | |
| Download: ML20236L658 (4) | |
Text
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I
~t From:
Allen Howe,a m.sJ j
To:
SCO, FCS, TJK1.5 o /b, a m u Date:
3/12/98 4:54pm
Subject:
Inspection Plan Here is a copy of the inspection plan for our inspection at ANO. I will try to contact Fritz or Tim K. with periodic updates. The exit is tentatively set for -9:30 am on 3/20.
Hotel info Hampton Inn, Russellville, ARK - 501-858-7199 Site Contact - Ray Keller 501-858-4688 CC:
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SNC UT Inspection PlanMarch 11,1998 Purpose / Scope: To review SNC and the VSC 24 Owners Group (the VSCOG includes ANO, Pt.
i Beach, Palisades, and SNC) demonstration of ultrasonic testing of the structural-lid closure weld on l
the MSB mock-up.
Dates: March 16-20,1998 Report No. 72-1007/98-202 Certificate Holder: Sierra Nuclear Corporation i
Location: Arkansas Nuclear One Site, Russellville Arkansas inspection Procedure (s): 60851 - Design Control of ISFl Components (Reference IP - 57080, NDE/UT Review / Work Observation / Record Review)
Inspectors:
Allen Howe, SFPO (Lead)
C. Ken Battige, SFPO Mike Anderson,INEEL Steven Doctor, PNNL Debbie Jackson, RES (Observer)
VSCOG
Contact:
Ray Keller 501-858 4688 Pager 501-964-1678 Jot.n Dosa 501-858-4621 Pager: 501-964-3991 FAX 501-858-4685 Key inspection areas:
Perform a detailed review of the UT methodology employed to examine the structurallid closure weld. This includes actual demonstration of the UT equipment, operation, selection of the proper signals, data acquisition, data analysis, and data interpretation. The UT technology will be demonstrated, on a full diameter mock-up, under simulated field conditions including restrictions on access to the weld volume, elevated temperatures, etc.
Evaluate differences between the mock-up and field conditions.
Review tabulated data on UT scans to determine error band on UT method. Data includes detection, sizing, type of flaw, location and orientation. Has the VSCOG determined an error band? If so evaluate that adequacy of the error band. ?
Review UT examination procedures. Verify that there are adequate controls described in the procedures to ensure that personnel are qualified (to take data and/or interpret data),
the essential variables are controlled, and that the procedure is sufficiently detailed to produce reliable and repeatable results. An examination strategy with a logic tree format is expected. Evaluate the various branches of the logic tree.
Evaluate UT issues issue 1 - UT "near field" effects. What measures will be taken to address UT examination in the near-field regime to assure reliable and repeatable examination results?
Issue 2 - Transducer size. For flaw sizing, it is generally better to use transducers that produce the smallest practicable sound beam cross section at the flaw location.
t The transducer described by the VSCOG produces a sound beam cross sectional area much larger than most of the flaws that are being sized. What measures is the VSCOG taking to ensure accurate flaw sizing with the transducer proposed for this UT examination technique? May provide a test block for examination by VSCOG.
Evaluate method (s) to access MSB. Design of Jacking device, set-up, operation, travel limits, etc.
Review the ALARA planning and evaluation.
finger rings for setup / removal neutron and gamma surveys temporary shielding low dose waiting / observation areas significant ALARA planning should be evident wrt job sequence, practice runs, communication between ALARA and job coordinators Review flaw insertion documentation Review mock up baseline UT data Review 72.48 information to determine what 72.48 evaluations will be needed.
Miscellaneous issues:
coc.tingencies for retrieval of lost parts, lanyards, etc.
QA/QC of demonstration
d Mall Envelope info:
(350859A9.A46 : 17 : 42080)
Subject:
Inspection Plan Creation Date:
3/12/98 4:54pm From:
Allen Howe Created By:
WND1.WNP7:AGH1 Recipients Action Date & Time Post Office WND1.WNP7 CJH CC (Charles Haughney)
FCS (Frederick Sturz)
SCO (Stephen O'Connor)
TJK1 (Timothy Kobetz)
Domain. Post Office Delivered Route WND1.WNP7 Pending WND1.WNP7 Files Size Date & Time SNC-PLAN.000 9042 03/11/9812:26pm MESSAGE 278 03/12/98 04:54pm View 4109 03/12/9811:54am Options Auto Delete:
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