ML022960581

Agenda & Handout for Public Meeting Re Preliminary Findings & Observations from Special Inspections

ML022960581
Person / Time
Site:	Davis Besse
Issue date:	10/16/2002
From:	Office of Nuclear Reactor Regulation, NRC/RGN-III
To:	FirstEnergy Nuclear Operating Co
References
Download: ML022960581 (8)

Text

PUBLIC MEETING U.S. NUCLEAR REGULATORY COMMISSION OAK HARBOR, OHIO October 16, 2002, 9:00 am EDT Purpose of Meeting Discuss preliminary findings and observations from the two NRC special inspections conducted to review the public and occupational exposure consequences of steam generator nozzle dam installations at Davis-Besse

AGENDA I. Introduction and Opening Remarks II. Summary Of Planning For And Conduct Of Steam Generator Nozzle Dam Installation III. Summary Of Release Of Contaminated Workers To The Public Domain And Consequences IV. Summary Of Dose To Workers From Internal Contamination During Work V. Summary Of Findings VI. Comments/Questions From Local Members Of The Public VII. Comments/Questions From All Members Of The Public VIII. Adjourn Meeting

U.S. NUCLEAR REGULATORY COMMISSION PUBLIC AND OCCUPATIONAL RADIATION SAFETY SPECIAL INSPECTION TEAMS (SITs) EXIT MEETING OPENING REMARKS/INTRODUCTIONS USNRC REPRESENTATIVES TOM KOZAK - TEAM LEADER, OCCUPATIONAL SIT JOHN HOUSE - TEAM LEADER, PUBLIC SIT JACK GROBE - CHAIRMAN, MC 0350 PANEL BILL DEAN - VICE CHAIRMAN, MC 0350 PANEL TONY MENDIOLA - SECTION CHIEF PDIII-2, NRR CHRISTINE LIPA - BRANCH CHIEF, RPB 4, DRP, RIII SCOTT THOMAS - SENIOR RESIDENT INSPECTOR, DB JAY COLLINS - GENERAL ENGINEER

OPENING REMARKS/INTRODUCTIONS (cont.)

• SIT DISPATCHED ON APRIL 17, 2002 TO REVIEW CONTAMINATED WORKERS IN PUBLIC DOMAIN

• 2ND SIT DISPATCHED ON SEPTEMBER 30 TO REVIEW POTENTIAL OVEREXPOSURE TO WORKERS DURING SG NOZZLE DAM INSTALLATIONS

• RESULTS WILL BE DOCUMENTED IN INSPECTION REPORT NOS. 02-06 AND 02-16 UNDER ONE COVER LETTER

• RESULTS ARE CONSIDERED AS UNRESOLVED ITEMS AND RISK ASSESSMENT AS TO BE DETERMINED UNTIL RISK ASSESSMENT IS COMPLETED

• RISK WILL BE EVALUATED USING THE PUBLIC AND OCCUPATIONAL RADIATION SAFETY SIGNIFICANCE DETERMINATION PROCESSES (SDPs)

SUMMARY

OF PLANNING FOR AND CONDUCT OF STEAM GENERATOR NOZZLE DAM INSTALLATIONS

• EVALUATION OF POTENTIAL RADIOLOGICAL HAZARDS NOT ADEQUATE TO IDENTITY AND PROTECT AGAINST ALPHA EMITTING RADIATION

• MISSED OPPORTUNITIES TO IDENTIFY POTENTIAL HAZARD INCREASING ALPHA EMITTER TREND HIGHER THAN PREVIOUS IODINE LEVEL IN RCS CRUD BURST JUST PRIOR TO SG BOWL ENTRY VERY HIGH CONTAMINATION LEVEL IDENTIFIED ON SG DIAPHRAGM ALPHA PARTICLES IDENTIFIED IN SG PLATFORM AIR SAMPLE

• SUBSTANTIAL POTENTIAL FOR OVEREXPOSURE

SUMMARY

OF RELEASE OF EXTERNALLY CONTAMINATED WORKERS TO THE PUBLIC DOMAIN

• SIX WORKERS INTERNALLY AND EXTERNALLY CONTAMINATED DURING SG NOZZLE DAM INSTALLATIONS

• SEVERAL ATTEMPTS MADE TO DECONTAMINATE THE WORKERS

• CONTAMINATION SURVEYS CONDUCTED AT RRA EXIT WERE INADEQUATE DID NOT IDENTIFY ALL EXTERNAL CONTAMINATION SOME PERSONAL CLOTHING NOT SURVEYED

• FOUR WORKERS FOUND CONTAMINATED AT OTHER SITES

• 16 DRPs FOUND IN PUBLIC DOMAIN

• DOSE CALCULATIONS - NO ADVERSE HEALTH EFFECTS TO WORKERS OR PUBLIC FROM DRPs

SUMMARY

OF DOSE TO WORKERS FROM INTERNAL CONTAMINATION DURING WORK

• TWO WORKERS RECEIVED RELATIVELY LARGE INTERNAL CONTAMINATIONS

• INITIAL ASSESSMENT CONDUCTED WITH WBC WHICH IS NOT SUITABLE TO MEASURE ALPHAS

• CONCENTRATIONS OF RADIOACTIVE MATERIAL IN AIR IN WORK AREAS NOT MEASURED

• DOSE ASSIGNED PRIMARILY BASED ON GAMMA EMITTING RADIATION

• CONTAMINATION IDENTIFIED TO CONTAIN HIGH ALPHA EMITTER CONCENTRATIONS IN AUGUST

• DOSE RECALCULATED USING SCALING FACTORS, RESULTS UNCERTAIN

• MULTIPLE BIOASSAY SAMPLES OBTAINED FROM WORKERS

• SAMPLES WERE NOT TIMELY - AWAITING RESULTS

SUMMARY

OF PRELIMINARY FINDINGS

• FAILURE TO ADEQUATELY IDENTIFY AND EVALUATE THE RADIOLOGICAL HAZARDS PRESENT IN SPITE OF NUMEROUS OPPORTUNITIES - SUBSTANTIAL POTENTIAL FOR AN OVEREXPOSURE

• FAILURE TO CONDUCT TIMELY AND SUITABLE MEASUREMENTS OF CONCENTRATIONS OF RADIOACTIVE MATERIAL IN AIR IN WORK AREAS OR OF CONCENTRATIONS OF RADIONUCLIDES EXCRETED FROM THE BODY - COMPROMISED THE ABILITY TO ASSESS DOSE

• FAILURE TO ADEQUATELY SURVEY WORKERS PRIOR TO RELEASE FROM SITE - RESULTED IN THE RELEASE OF RADIOACTIVE MATERIAL OUTSIDE CONTROLLED AREA INTO THE PUBLIC DOMAIN

• THE FINDINGS ARE UNRESOLVED ITEMS WHOSE SIGNIFICANCE IS TO BE DETERMINED - EACH FINDING MAY INVOLVE VIOLATIONS OF NRC REQUIREMENTS