View source for A07040, Submits Results of long-term Analysis Per Commitment in 880324 Response to NRC Bulletin 88-002, Rapidly Propagating Fatigue Cracks in Steam Generator Tubes

{{Adams
| number = ML20247K338
| issue date = 05/25/1989
| title = Submits Results of long-term Analysis Per Commitment in 880324 Response to NRC Bulletin 88-002, Rapidly Propagating Fatigue Cracks in Steam Generator Tubes
| author name = Mroczka E
| author affiliation = CONNECTICUT YANKEE ATOMIC POWER CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| docket = 05000213
| license number = 
| contact person = 
| document report number = A07040, A7040, IEB-88-002, IEB-88-2, NUDOCS 8906010273
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 2
}}

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                          ' #.      4 NORTHEAST UTILITIES                                                   cene,.i Omce. . soia n si,..i. Boriin. connecticut 34comeow w mo.recw ,
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* HARTFORD, CONNECTICUT 06141-0270 U ,[ul$I[w~c1w, k   '   J um r.sr ocaa n. nun cc.                                      (203) 665-5000 May 25, 1989 Docket No. 50-213 A07040 Re: Bulletin 88-02
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Mr. Villiam T. Russell, 'Aegional Administrator Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406

==References:==
(1) NRC Bulletin No. 88-02, " Rapidly Propagating Fatigue Cracks in Steam Generator Tubes", dated February 5, 1980.
(2)      E. J. Mroczka letter to V. T. Russell, " Response to NRC Bulletin No. 88-02" dated March 24, 1988.
Gentlemen:
Haddam Neck Plant Response to NRC Bulletin No. 88-02 Reference (1) required licensees to take certain actions to minimize the potential for a steam generator tube rupture event caused by a rapidly propagating fatigue crack such as occurred at North Anna Unit 1 on July 15, 1987. Peference (2) responded to Reference (1) with the results of short term actions and committed to a long term analysis in response to Item C.2a of Reference (1).
The purpose of this letter is to fulfill that commitmerit.                     In May 1989, a study commissioned by the Northeast Utilities Rervice Cocpany (NUSCO) on behalf of the Connecticut Vankee Atomic Power Company (CYAPC0) was completed. This study was outlined in Attachment 3 to Reference (2). The study was performed as indicated therein and rehoved that there are no tubes in any Haddam Neck steam generator which are subject to conditions which                                      l vould lead to a North Anna 1987 type event. Details of the study are available for NRC Staff review at our corporate office.
8906010273 890525                                                                             glI3 PDR    ADDCK 05000213                                                                              't G                          PNU

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USNRC A07040/Page 2 May 25, 1989 In response to Item C.1 of Reference (1), Reference (2) committed to an enhanced primary to secondary leak monitoring program. While it is not currently CYAPCO's intcntion to discontinue this program, it should be noted that based on the aforementioned study results, the enhanced leak monitoring program, in our opinion, is not required in order to preclude a North Anna 1987 type event.
If there are any further questions, please do not hesitate to contact my staff.
Very truly yours, CONNECTICUT YANKEE ATOMIC POWER COMPANY Wf E. J p foczka    #
Senror Vice President STATE OF CONNECTICUT )
                                                              ) ss. Berlin COUNTY OF HARTFORD       )
Then personally appeared before me,       E. J. Mroczka, who being duly sworn, did state that he is Senior Vice President of Connecticut Yankee Atomic Power Company, a Licensee herein, that he is authorized to execute and file the foregoing information in the name and on behalf of the Licensee herein, and that the statenents contained in said information are true and carrect to the best of his knowledre and belief.
L%
Notaky Public AA  ~
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!                                    cc: A. B. Vang, NRC Project Manager, Haddam Neck Plant J. T. Shedlosky, Senior Resident Inspector, Haddam Neck Plant U. S. Nuclear Regulatory Commission Document Control Desk Vashington, DC 20555
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