ML20072Q748
| ML20072Q748 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/17/1983 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-SSINS-6820 IEB-82-02, IEB-82-2, NUDOCS 8304050307 | |
| Download: ML20072Q748 (7) | |
Text
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- 4 BALTIMORE GAS AND
)
ELECTRIC i
CHARLES CENTER.P.O. BOX 1475 BALTIMORE, MARYLAND 21203 l
ARTHUR E. LUNDVALL. JR.
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March 17,1983 U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406
- ATTENTION:
Mr. Ronald C. Haynes Regional Administrator
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit No. 2, Docket No. 50-318 Ir:spection of Threaded Fasteners in the Reactor Coolant Pressure Boundary of PWR Plants
References:
(a)
IE Bulletin 82-02, " Degradation of Threaded Fasteners in the Reactor Coolant Pressure Boundary of PWR Plants".
(b)
Letter to R. C. Haynes from A. E. Lundvall, Jr.,
dated July 30,1982 (c)
Letter to R. C. DeYoung from A. E. Lundvall, 3r., dated October 1,1982 Gentlemen:
IE Bulletin 82-02 established requirements for implementation of Maintenance Procedures, Inspections and Reports of examination results concerning certain Reactor Coolant Pressure Boundary Threaded Fasteners. Threaded fasteners at Calvert Cliffs which were addressed in the Bulletin included those in (1) Pressurizer and Steam-Generator Manway Closures, (2) Valve bonnets, and pump flange connections on lines six inches or greater nominal pipe size. Reference (c) stated our intent to implement the Regulatory Guide 1.65 exclusion allowance for reactor vessel closure studs contained in IE Bulletin 82-02. This letter's purpose is to complete Action Item 4 of the IE Bulletin 82-02 for - those fasteners examined during Calvert Cliffs -Unit 2 ~1982-83 refueling outage.
As required by Action Item 1 Calvert Cliffs Administrative and Maintenance Procedures
- have been reviewed and updated where necessary to insure training of proper bolting / stud practices, detensioning and retensioning practices and gasket installation and controls.
Action Item 2 of Reference (a) requires that whenever those connections identified in the:
scope of the Bulletin are opened for inspection or maintenance the threaded fasteners shall be removed (unless "slezed" or interference fit), cleaned and inspected per -
8304050307 830317 t-I PDR ADOCK 05000318
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a Mr. R. C. Haynes March 17,1983
- Page 2 -
- IWA-2210 and IWA-2200 of ASME Code Section XI.~
The component connections examined per Action Item 2 for the Unit 2 Cycle 5 refueling outage included: _1) 21 and 22 steam generator primary manways; 2) four (4) safety l_njection'. check valve bearing covers. (2-51-215, 2-51-225, 2-SI-235 and 2-51-245).
The visual and surface exams performed revealed that a' number of steam generator studs were pitted severely enough to.cause concern of thread gallMg upon reinstallation f (These studs were not reused).
The safety injection check valve bearing cover studs showed no signs of degradation.
Complete descriptions ei the examinations performed and the results are included in Enclosure (1).
Should you have further questions regarding this report,' please do not hesitate to contact 4 us.
Very truly yours
- - wA MM A e
A. E. Lundy 1,
Vice President - Supply AEL/KMH/ LOW /sjb Enclosures cc:
J. A. Biddison, Esquire G. F. Trowbridge, Esquire D. H. Jaffe, NRC R. E. Architzel, NRC STATE OF MARYLAND :
TO WIT:
CITY OF B.ETIMORE :
Authur E. Lun va,1 3r., being ~ duly sworn. states that he is Vice President of the d ll Baltimore Gas and Electri-Company, a corporation of the State of Maryland; that he-provides the foregoing response for the purposes therein set forth; that the statements
- made' are true and correct to the best of his knowledge, information, and bellsf; and that he.was authorized to provide the response on behalf of said Corporation..
^ TITNESS my Hand and Notarial Seal:
ftde Notary Public..
'/u~'1,[6 I My Commission Expires _
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ENCLOSURE (1)
RCPB THREADED FASTENER EX5MINATION Unit Date Component Unit 2 December 1982 21 Steam Generator Manways Unit 2 December 1982 22 Steam Generator Manways Technical Data Stud Dimensions:
1.1/2"- 8 UN x 101/2" Stud Material:
ASTM A-540 GR. B 24 CL. 3 Phosphate Coated Lubricant:
Neolube Gasket Material:
Flexitallic Type 304 SS and Asbestos,200 PPM Cl Maximum Examir.ation Procedures NDE 5.704 Rev. O Visual Examination of Nuclear Reactor Components NDE 5.104 Rev.1 Magnetic Particic Examination of Ferromagnetic Material Examination Summary The 80 manway studs were removed for completion of the examination:. The visual and magnetic particle exams showed that 61 of the 80 studs had either indications of pitting.
or thread damage (incurred during removal). These 61 studs were not reused for fear they would cause thread galling'upon reinstallation. No indications of erosion or cracking were found.
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' RCPB TIIREADED FASTENER EXAMINATION Unit Date -
Component '
Unit 2 December 1982 2-SI-215; 12" Atwood & Morrill-Swing Check Valve.
Technical Data 3 earing Cover Stud Dimensions:
7/8" - 9 UNC x 3" (Fully Th' eaded r
Bearing Cover Stud Material:
ASTM A-453 GR.' 66 Chrome Plated Threads ~
Felpro N-5000 Lubricar.t:
Flexitallic Type 304 SS and Bearing Cover Gasket Material:
Asbestos,200 PPM Cl Maximum Examination Procedures NDE 5.201 Rev. 2 Water washable liquid penetrant examination of ferrous and.
nonferrous materials NDE 5.701 Rev. 3 Visual examination of valves Examination Summary The sixteen bearing cover studs were removed for the completion of the examinations.
No indications of stud degradation were found.
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4 RCPB THREADED FASTENER EXAMINATION
. Unit -
Date Component Unit 2 December 1982 g2-SI-225; 12" A.twood & Morrill
- Swing Check Valve.
Technihal Data". l Bearing Cover Stud Dimensions:
7/8" - 9' UNC s 3" (Fully Threaded Bearing Cover Stud Material:
. ASTM A-453 GR. 66-Chrome Plated Threads Lubricant:
Felpro N-5000 Bearing Cover Gasket Material:
Flexitallic Type 304 55 and -
Asbestos,200 PPM Cl Maximum Examination Procedures NDE 5.201 Rev. 2 Water washable liquid penetrant examination of ferrous and nonferrous materiais NDE 5.701 Rev. 3 Visual examination of valves l
Examination Summary The sixteen bearing cover studs were removed for the completion of the examinations.
No indications of stud degradation were found.
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RCPB THREADED FASTENER EXAMINNTION Unit Date Component Unit 2 December 1982 2-51-245; 12" Atwood & Morrill Swing Check Valve Technical Data Bearing Cover Sted Dimensions:
7/8"- 9 UNC x 3"(Fully Threaded Bearing Cceer Stud Material:
ASTM A-453 GR. 66 Chrome Plated Threads Lubricant:
Felpro N-5000 Bearing Cover Gasket Material:
Flexitallic Type 304 SS and
' Asbestos,200 PPM Cl Maximum Examination Procedures NDE 5.201 Rev. 2 Water washable liquid penetrant examination of ferrous and nonferrous materials NDE 5.701 Rev. 3 Visual examination of valves Examination Summary -
The sixteen bearing cover studs were removed for the completion of the examinations.
No indications of stud degradation were foind.
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r-RCPB THREADED FASTENER EXAMINATION Unit Date Component Unit 2 December 1982 2-S1-235; 12" Atwood & Morrill
' Swing Check Valve Tect nical Data Bearing Cover Stud Dimensions:
7/8" - 9 UNC x 3" (Fully Threaded Bearing Cover Stud Material:
ASTM A-453 GR.~ 66 Chrome Plated Threads Lubricant:
Felpro N-5000 Bearing Cover Gasket Material:
Flexitallic Type 304 SS and Asbestos,200 PPM Cl Maximum Examination Proc 5dures NDE 5.201 Rev. 2 Water washable liquid penetrant examination of ferrous and.
nonferrous materials 4
NDE 5.701 Rev. 3 Visual examination'of valves
. ~
Examination Summari The sixteen bearing cover studs were removed for the completion of the examinations. -
No indications of stud degradation were found.
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