ML20054D305
| ML20054D305 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 04/06/1982 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Beckham J GEORGIA POWER CO. |
| References | |
| TAC-07811, TAC-08019, TAC-7811, TAC-8019, NUDOCS 8204220567 | |
| Download: ML20054D305 (8) | |
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- n DISTRIBUTION Docket File g
NRC PDR e
N L PDR TERA g
Docket No. 50-366 NSIC ORB #4 Rdg RECEIVED 9
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APR 151982>
OELD u mm xm m T a
lir. J. T. Beckham, Jr.
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n a:n a n Vice President - Nuclear Generation IE Georgia Power Company ACRS-10 P. O. Box 4545 MFairtile G
Atlanta, Georgia 30302 RIngram Gray File
Dear !!r. Beckham:
RCilimberg By letter dated March 12, 1982, we forwarded requests for additional infomation needed to complete our review of relief requests pertaining to the Inservice Inspection (ISI) Program for Hatch Plant ilnit No.1.
This letter transmits the requests for additional information, enclosed, needed to complete our review of the Hatch 2 ISI Program relief requests.
This review is being perfomed by:
Dr. Douglas A. Outlaw Science Applications, Inc.
1710 Goodrich Drive ficLean, Virginia 22102 Kindly provide Dr. Outlaw a copy of your response in order to expedite the review process.
Please respond to this request by June 11, 1982 O!!B clearance is not required as this request is unique to Hatch Unit No. 2.
Sincerely,
.a.a g c.
Jc=12, srogy John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing
Enclosure:
Request for Additional Informa$1on cc w/ enclosure:
See next page LM OFFICE)
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)FFICIAL RECORD. COPY us= =-ass +o G
Hatch 1/2 G;orgia Power Company 50-321/366 cc w/ enclosure (s):
Mr. James P. O'Reilly, Regional Administrator G. F. Trowbridge, Esq.
U. S. Nuclear Regulatory Comission Shaw, Pittman, Potts and Trowbridge Region II 1800 M Street, N.W.
101 Marietta Street, Suite 3100 Washington, D. C.
20036 Atlanta, Georgia, 30303 Ruble A. Thomas _.
Vice President P. O. Box 2625 Southern Company Services,' Inc.
Bimingham, Alabama 35202 Ozen Batum Charles H. Badger Southern Company Services, Inc.
Office of Planning and Budget Post Office Box 2625 Room 610 Bimingham, Alabama 35202 270 Washington Street, S.W.
Atlanta, Georgia 30334 Appling County Comissioners County Courthouse Baxley, Georgia 31513 Mr. L. T. Gucwa Georgia Power Company Engineering Department P. O. Box 4545 Atlanta, Georgia 30302 Mr. Max Manry Georgia Power Company Edwin I. Hatch Plant P. O. Box 442 Baxley, Georgia 31513 Regional Radiation Representative EPA Region IV 345 Courtland Street, N.E.
Atlanta, Georgia 30308
. Appling County Public Library 301 City Hall Drive Baxley, Georgia 31513 fir. R. F. Rogers U. S. fluclear Regulatory Comission Route 1, P. O. Box 279 l
Baxley, Georgia 31513 j
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ENCLOSURE I
REQUEST FOR ADDITIONAL INFORMATION INSERVICE INSPECTION PROGRAM Hatch 2 1.
Pressure Retaining Welds in Vessels, Vessel Nozzle Welds and Vessel Supports (Categories B-B, Item Bl.2; B-D, Item Bl.4; and B-H, Item Bl.12, Note 7. Pages 1-6 of Table 5.2-7, Ref.1)
Relief is requested for Categories B-B, B-D and B-H.
Code Category B-B requires a volmetric examination of at least'10% of the length of each longi-tudinal shell weld and meridional head weld and 5% of the length of each cir-caferential shell weld and head weld.
Code Category B-D requires a volumetric examination of 100% of the nozzle-to-vessel weld for each nozzle.
Code Category B-H requires a volmetric examination of at least 10% of the circum-ference of the vessel support skirt weld to the vessel.
The relief requested in note 7 is for partial examination of those welds which cannot' be completely examined by remote means.
If radiation levels permit, the examinations can be completed manually.
The following additional infomation is requested of Georgia Power Company (GPC):
(a) Please confirm that if radiation levels pennit manual examinations, no code relief is required.
(b) Is it known at this time whether radiation levels will permit the manual examinations? Whatbasis(relatedtoman-remexposure) is being used to make this detennination?
(c) Is it po'ssible to perfonn any of these examinatic,:ss internally?
Please discuss the degree of difficulty involved.
(d) For each weld for which relief is requested, please provide an estimate of the weld area that cannot be examined according to code requirements. Support estimate with sketches as appropriate.
2.
Pressure Retaining Welds in Control Rod Drive Housings (Category B-0, Item Bl.18, Note 12, Pages 1-6 of Table 5.2-7, Ref.1)
Exemption is claimed for control rod drive housings based on IWB-1220(b)(1)..
The following additional infonnation is requested of GPC:
(a) Pursuant to IWB-1220(b)(1), show that under the postulated condi-tions of. loss of. coolant from the component (for which exemption is claimed) during normal reactor operation, the reactor can' be shut down and cooled down in an orderly manner assuming makeup is provided by the reactor coolant makeup system only, and the makeup system is using onsite power.
If previously discussed in submittals to NRC, document by reference.
(b) Please identify the components and lines and the nurnber of welds involved in this exemption.
3.
Pressure Retaining Welds in Piping (Category B-J. Item B4.5. Note 8, Pages 1-6 of Table 5.2-7, Ref.1)
Code relief is requested as some examinations are limited due, to geometric configuration or accessibility.
Identification of the welds is not made.
The following additional informat. ion is requested of GPC:
(a) T.able Q 121.16-1 (Amendment 44, 5/78, Ref.1) identifies Category B-J welds which could not be completely examined during preservice in-spection. Does this table list all of the Category B-J welds for which code relief is requested for the Inservice Inspection Pro-gram?
(b) If not, please identify the additional welds for which code relief is requested.
(c) What supplemental examinations will be perfonned?
4.
Support Members for Piping, Valves and Purnps (Category B-K-1 Items B4.9 and B5.4; Note 14, Pages 1-6 of Table-5.2-7, Ref.1)
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Code relief is requested for integrally-welded support attachments. The welds are described in Table Q 121.20-1 (Amendment 44, 5/78 Ref. 1).
s The following additional infonnation is requested of GPC:..
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(a) Does Table Q 121.20-1(5I78)representthecurrentCategoryB-K-1 welds for which you request relief?.If not, please furnish an updated list.
(b) No supplemental examination is planned for those welds covered.
by note 2 in the table. What assurance can you furnish relative to the strength and reliability of these welds?- Have calculations been performed to assure that a satisfactory safety factor has been included in the design?
(c)
If any of the above infomation has already been transmitted to NRC please furnish the appropriate references.
5.
Pump Casinos (Category B-L-2, Item B5.7; Note 10 Pages 1-6 of Table Table 5.2-7, Ref.1)
Code relief is requested of a visual examination of the pump internal pressure boundary,in Table 5.2-7; however, the note 10 statement is in com ~
pliance with the code.
If note 10 is incorrect and code relief is necessary, the following additional infomation is requested of GPC:
(a) What is the technical justification for code relief?
(b)
Has ultrasonic wall thickness measurement been considered as an alternate examination method?
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(c) What are the manufacturer's reconnendations regarding the dis-assembly of the pumps for regular maintenance?
(d)
Based on the industry experience with the pumps, what is the likelihood that the HNP #2 plant will operate ten years with3ut at least one ptsnp being disassembled for maintena,nce?
6.
Pressure Retaining Welds in Pressure Vessels (Category C-A, Item C1.1, Note 2, Pages 1-3 of Table 5.2-8, Ref.1)
Code relief is requested from examining 40 percent of a circisnferential weld in the residual heat removal heat exchangers.
The following additional infomation is requested of GPC:
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(a) Please explain why the weld for which code relief is requested cannot be examined volumetrically, yet it is possible to per-fonn a full surface examination of the weld. This is not evident in Isometric 18 Figure Q 121.17,5 (1/78).
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7.
Support Members for Piping, and Pressure Retaining Welds in Piping (C_ategory C-E-1. Item C2.5; Category C-F, Item C2.1; and Category C-G, Item C2.1,. Note 1, Pages 1-3 Table 5.2-8, Ref. 1)
A general code relief request is made for Class 2 piping systems and components.
Tite following additional information is requested of GPC:
- .y (a) Does Tab 1_et,Q _121.17-1 (Ref.1) list all of the welds for which code r,el.i.ef _is r.equested in the above categories and which are discusse_d,in note 1 of Table 5.2-8?
(b) If not;;p.1. ease identify the additional welds for which code relief ds requested.
(c) What suppTemental examinations are planned?
(d) Please identify the welds discussed in 5.2.8.2 a.1.2 and 3 of Ref.1.
WE;I'CE3; Are these included in Table Q 121.17-17 1.
H.*i:-2 Fi.11 Safe:y A. '.,:.
8.
Pressure Retaining Welds in Pumps (Categories C-F and C-G, Item C3.1,
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[Nbte 3, 'Page$ l'to 3;of Table 5.2-8, Ref.1)
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J. Code _ relief is_ requested due to external inaccessibility.
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"IThe fg))owing3 additional information-is requested of.GPC:
r RA(aln Has49 trasonic;wa11 thickness measurement been considered as an 1
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alternate examination method?
(b) What are the manufacturer's reconsnendations regarding the dis-assembly of the pumps for regular maintenance?
f (c) Based on the industry experience with the pumps, what is the likelihood that the HNP-2 plant will operate ten years without at least one pump in each of these groups being disassembled for maintenance?
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6 (d) Please discuss the-degree ~s of difficulty involved in the dis-assembly of these pumps.
9.
We are evaluating code relief requests and code exemptions that are. listed in references 1, 2 and 3.
Additionally, in reference I we have only reviewed Sections 5.2 and Q 121.
(a) Art all of the code relief requests that Georgia Power Company currently has in effect for HNP-2 included in the above documents which we have reviewed? If not, please advise by reference. Also,
.any code exemptions that are to be used must be reviewed.
In the above references we have found only one reference to code exemptions for Class 1 and 2 components (Item 2, above).
See (c) below.
(b) Under the change in Regulation 10 CFR 50.55a effective November 1, 1979, the ISI Program, when finally approved, will cover the
, entire current 10-year inspection interval, i.e., from September 5,
.1979 to September 5,,1989 for HNP-2. Does this result in any changes GPC wishes to make in the relief requests? Does GPC require other ISI relief?
(c) Based on references 1 and 2 we are reviewing the HNPa2 ISI Program
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in accordance with compliance to 1974 ASME Section XI Code with Addenda through Sumer 1975.
This edition of the Code allowed exemptions under IWC-1220(c)
(chemistry control) and IWC-1220(a) (low operating pressure and temperature) which have been deleted from later editions of the Code.
If components in the RHR, ECCS or containment heat removal systems have been exempted under IWC-1220(a) or (c), we will require that a representative sample of these components be exam.ined.
10.
Note 9 of Table 5.2-7 (Ref.1) reads:
"A surface examination, instead of a volunetric examination, will be made due to metallurgical properties
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of the valves." Please advise where this applies.
If this is a code relief request please clarify and give additional technical justification.
- 11. The request for additional information (RAI) on HNP-1 (Reference 4)
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contains items that are applicable to this RAI for HNP-2.
In responding to the questions please. furnish replies that. cover both HNP-1 and HNP-2.
Item No.'
Reference to HNP HNP-1 RAI Subject Code Relief Request.
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Repair Procedures Pages 5.2-34b and c of Ref.1 3
Valve Bodies Note 15. Table 5.2-7, Ref. 1 6
Bolting Notes 4 and 5. Table 5.2-8, Ref.1 8
Class 3-Testing of Page 5.2-34c, Ref. 1 O
Buri,ed Piping 9
Class 3 - System Page 5.2-34c, Ref.1 i
Pressure Testing of Lines 2-inches and, Smaller
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10 C1 ass.3 - System Page 5.2-34c, Ref. 1 Pressure Testi.ng -
Plant Service Water
REFERENCES:
1.
HNP-2 Final Safety Analysis Report (FSAR), Amendment 46, 9/78.
2.
W. A. Widner (GPC) to Director of NRR(NRC), May 1,1980,
" Inservice Inspection Information Submittal and Relief Request."
3.
J. T. Beckham (GPC) to Director of NRR(NRC), March 2,1982,
" Inservice Inspection of Supports for Class 1,2 and 3 Components."
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4.
RAIonHNPf1(March 1982)
April 2, 1982 s
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