ML19338F541
| ML19338F541 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/14/1980 |
| From: | Hukill H METROPOLITAN EDISON CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| TLL-492, NUDOCS 8010200486 | |
| Download: ML19338F541 (2) | |
Text
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-. d Metropolitan Edison Company N.
Post Office Box 480 Middletown, Pennsylvania 17057 717 9444041 Wnter's Direct Dial Numoer October 14, 1980
!L 492 Office of Nuclear Reactor Regulation Attn:
R. W. Reid, Chief Operating Reactors Branch No. 4 U. S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Modifications to Technical Specifica' tion Change Request No. 77A heed on telephone conferences with Mr. D. Dilanni and other NRC representatives and Messrs. R. Summer and D. Fitchell of my staff, the following modifications to Technical Specification Change Request No. 77A are recuested.
The arrangement for the second item is slightly changed from what was discussed.
1.
The following statement is to be added to specification 3.9.1.2:
The report of each completed tendon surveillance will include a sectica dealing with trends for the rate of prestress loss as compared to the predicted rate for the duration of the plant life (after an adequate number of surveillances have been completed). This report will be submitted to the NRC per specification 6.9.3. A(1).
2.
The following statement is to be added to 4.4.2.1.3:
The containment surfaces inspection shall include the reexamination of all significant abnormalities (e.g. concrete scaling, cracking, grease leakage, etc.) discovered in the previous inspection to determine whether conditions have stabilized. The inspection program shall be modified accordiraly if obvious deteriorating conditions are observed.
3.
The following specification is to be added:
4.4.2.1 Inspection for Crack Growth at Dome Tendons in the Ring Girder Anchoring Areas
\\
Concrete around the dome tendon anchoring areas shall be inspected for crack growth during the 10 and 15 year h, f O inspections, by monitoring cracks greater than 0.005 inches I
in width.
Select as a minimum,.nine dome tendons anchoring areas giving preference to areas having cracks greater than 0.005 inches in width. The width, depth (if depth can be
- 8010'200 %
Merrcoottan Ec: son Comcany is a Member cf the Genera! Pubhc UMt:es Systern
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.R.'W.'Reid,_ Chief
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-TLL 492 measured with: simple existing plant instruments,Ji.e., feeler t
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gauges,Lwire)k and length of 'the selected cracks shall be
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measure'.and mapped by charting.- This' inspection may be d
discontinued if the concrete cracks show no sign of growth.
- If, however, the inspections indicate crack growth, an investigation of the cause; and safety impacts should be performed.
54i Change the wording'of~the' introduction to section 4.4.2.1.1 to read as follows:
4.4.2.1.1 Containment Tendens Tendon surveillance'was conp1=ced for one year, three years-and five years following the initial structural integrity using a-Tech. Spec. based on Regulatory Guide 1.351Rev. 1.
- The containment tendons structural integrity shall be demonstrated i
at the end of ten years following the initial containment structural integrity test and at five year intervals thereafter-by:
. Based ~on our review,_ Met-Ed finds these changes acceptab1_e for inclusion with' l
our TSCR No. 77A.
Sincerely, Director,'TMI-l l
HDH:SGM:Ima i
cc: 'i. J. Snyder.
J. T. Collins B. H. Grier D. Dilanni H. Silver i-eM t
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