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MONTHYEARML20108E1231984-12-0606 December 1984
Forwards NEDO-30825, Core Spray Sparger Crack Analysis for Ei Hatch Nuclear Power Station,Unit 1, in Response to IE Bulletin 80-13, Cracking in Core Spray Spargers
Project stage: Other
ML20134L7041985-08-22022 August 1985
Submits Justification for Continued Operation for Unlimited Number of Cycles W/One or More Cracked Core Spray Spargers, Per IE Bulletin 80-13, Cracking in Core Spray Spargers & NRC .Ge NEDO-30825 Cited
Project stage: Other
ML20137B2701986-01-0606 January 1986
Submits Results of Visual Insp of Core Spray Spargers, Associated Piping & Installed Clamping Device,Per IE Bulletin 80-13 & NRC .Approval for Continued Facility Operation Requested
Project stage: Other
ML20137D9681986-01-0909 January 1986
Discusses 850822 Submittal Re Insp of Cracked Core Spray Spargers Per IE Bulletin 80-13.Requested Relief Will Be Granted After Insps Performed & Results Transmitted to NRC
Project stage: Other
ML20154D5211986-02-28028 February 1986
Discusses Discovery of Addl Shop Weld in Recirculation Sys Loop a During Inservice Insp & IGSCC Mitigation Activities. Util Statements Re Performance of Stainless Steel Piping Weld Exams Conducted During 1984 Outage Require Correction
Project stage: Other
ML20154J1591986-02-28028 February 1986
Provides Addl Info Re Results of Recent Core Spray Sparger Exam Reported Per IE Bulletin 80-13 in .Extent of Insp Performed on Crack Discovered During Last Refueling Outage & Air Bubble Testing Discussed
Project stage: Other
ML20154L6451986-03-0606 March 1986
Rev 0 to Evaluation of IGSCC Flaw Indications & Weld Overlay Designs for Ei Hatch Unit 1 - Fall 1985. Maint/Refueling Outage
Project stage: Other
ML20154M4821986-03-10010 March 1986
Notification of 860318 Meeting W/Util,Southern Svcs & Structural Integrity Assoc in Bethesda,Md to Discuss Results of Insp of Piping & Resolution of IGSCC Indications
Project stage: Meeting
ML20205M9461986-04-24024 April 1986
Safety Evaluation Supporting Plant Operation in Present Configuration for 18-month Fuel Cycle.Plans for Insp &/Or Mod of Svc Sensitive Austenitic Stainless Steel Piping Sys Requested 3 Months Before Start of Next Refueling Outage
Project stage: Approval
ML20205M9381986-04-24024 April 1986
Forwards Safety Evaluation Based on Util 860106,0228 & 0310 Submittals Re Insp & Repairs of Recirculation,Rhr,Rwcu Sys Piping,Recirculation safe-ends & Core Spray Spargers During 1985 Outage.Unit Can Be Run for 18-month Fuel Cycle
Project stage: Approval
ML20211K6381986-06-23023 June 1986
Forwards Comments in Response to NRC 860424 SER Re Repair & Insp of Reactor Coolant Piping Sys & Core Spray Spargers Conducted During Fall 1985 Maint/Refueling Outage
Project stage: Other
ML20209D4221986-09-0505 September 1986
Forwards Response to Util 860623 Comments on NRC Safety Evaluation Re Insp & Repair of Reactor Coolant Piping Sys & Core Spray Spargers During 1985 Outage.Addl Info Requested Re Qualifications of Southern Co Svcs UT Subcontractors
Project stage: Approval
ML20213F0191986-11-0606 November 1986
Forwards Response to NRC 860905 Request for Addl Info Re Qualifications of Subcontractors Performing Ultrasonic Exams of Stainless Steel Piping & Components During Winter 1985-86 Maint/Refueling Outage
Project stage: Request
ML20209A8931987-01-23023 January 1987
Advises of Visual Insp of Core Spray Spargers (CSS) & Associated Piping During Recently Completed Maint & Refueling Outage Per IE Bulletin 80-13.No Cracking of CSS or Piping Between Inlet Nozzle & Vessel Shroud Observed
Project stage: Other
1986-02-28
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Text
1 Georia Power Company 333 Piedmont Avenue AUarta. Georgia 30308 Tefephone 404 526 6526 Mang Address Post Office Boi 4545 At:aata Georg a 303m GeorgiaPower L T. Gucwa
. -. / m m m va m Maragar Ectear Sa'ety a^d L censeg Departr ent 2548N February 28, 1986 Director of Nuclear Reactor Regulation Attention: Mr. D. Muller, Project Director BWR Project Directorate No. 2 Division of Boiling Water Reactor Licensing U. S. Nuclear Regulatory Commission Washington, D. C.
20555 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 EDWIN I. HATCH NUCLEAR PLANT UNIT 1 CORE SPRAY SPARGER INSPECTION Gentlemen:
Pursuant to the requirements of ISE Bulletin 80-13, Georgia Power Company (GPC) reported the results of the recent Hatch Unit I core spray sparger examination in a
letter dated January 6,
1986 Additional information concerning that inspection was requested by Mr.
George Rivenbark, Hatch Licensing Project Manager, and is provided herein.
GPC was first requested to describe the extent of the inspection performed on the crack discovered during the last refueling outage.
The crack and the clamping device installed on the sparger were described in our submittal dated December 6,1984 The clamp allows visual inspection of only a limited portion of the crack.
The visible portion begins at the top of the sparger and spans approximately 25-300 of the pipe circumference in the direction of the reactor vessel centerline.
The recent inspection revealed no evidence of crack growth.
The visible portion of the crack had not increased in width, nor was any new cracking observed on any area of the sparger.
No degradation of the clamp had taken place.
GPC was also requested to discuss any air bubble testing which has been performed.
An air bubble test would indicate if a core spray sparger crack were through-wall by pres:urizing the submerged sparger with air and observing for bubbles escaping through the crack.
Such a test was not performed when the Hatch 1 core spray sparger crack was discovered because GPC chose to take conservative corrective measures which obviated the need for the test
$O0,\\
0603100491 060229 PDR ADOCK 05000321 0
PDR 1 D
GeorgiaPower A Director of Nuclear Reactor Regulation Attention: Mr. D. Muller, Project Director BWR Project Directorate No. 2 February 28, 1986 Page Two resul ts.
GPC elected to install the clamping device on the sparger even though an analysis demonstrated that the clamp was not necessary for continued safe operation with a 3600 through-wall crack.
Since GPC's corrective measures were bounding for the worst case cracking, it was not necessary to know if the actual crack was through-wall.
The expense of performing an air bubble test was therefore not justifiable.
Please contact this office if you have any further questions.
Very truly yours, WY#<~=~
L. T. Gucwa JHartka/mb xc:
Mr. J. T. Beckham, Jr.
Mr. H. C. Nix, Jr.
Dr. J. N. Grace (NRC-Region II)
Senior Resident Inspector GO-NORMS TCClit
