ML19296B902
| ML19296B902 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 02/19/1980 |
| From: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002220348 | |
| Download: ML19296B902 (2) | |
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101-SHIELDS L. D ALTROFF ELacta c Pm c tom Febr2ary 19, 1980 Y. r. Thomas A.
Ippolito Chief, Operating Reactors Branch No. 3 Division of Operating Reactors US Nuclear Regulatory Commission Washington, DC 20555 RE:
Peach Bottom Atomic P ow e r Station Inservice Inspection Program Units No. 2 and 3. Docket Nos. 50-277 & 50-273 Dear "r.
Ipp oli t o:
Philadelphia Electric Company requests modification to an ultrasonic examination requirement in the 1974 edition of Section XI of the ASME Boiler and Pressure Vessel Code. a:s applicable to the Inservice Inspection Program at Peach Bottom
, Atonic Power Station.
Specifically. we are requesting that the acceptance criteria in Article IWA-3000, Paragraph IWA-3100 (b )
referenced to the original cons truction code be based on a code no earlier than that utilized during the baseline inservice inspection examinations (1968 Edition of ASME Section III).
The adoption of the 1974 Edition of Section XI has created some inconsistencies between examinations condu ct ed t oday and those conducted during p revious ISI examinations. including the baseline.
The governing code for the baseline examinations at Peach 30ttom was the 1970 Edition of ASME Section XI and where practicable the guidelines of Addenda through Winter 1971 Examinations perf ormed to the 1970 edition of the Code were evaluated, as per Article IS-300, in accordance with the acceptance criteria specified in the 1968 Edition of the ASME Code,Section III.
Baseline examinations and all exaeinations conducted p rior to September 1978 were evaluated in accordance with this Code.
Subsequently, the standard for the Peach Bottom Inservice Inspection Program was upgraded to the 1974 Edition of ASME Code Section XI, including Addenda through Summer 1975 in 8 002220
M
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Mr.
T.
A.
Ippolito, Chief Page 2 accordance with 10 CFR 50.55a.
The adoption of the 1974 Edition of Section XI creates an inconsistency for Peach Bottom in that
' Article IWA~-3000', Paragraph IWA-3100 (b ), now specifies that indications be evaluaecd in accordance with the acceptance c ri te ria.. of _ the Code applicable to the construction of the component.
At Peach Bottom, certain comp onents were constructed to the 1965 Edition of ASME Section III, which predates the 1968 Edition of ASME Section III used for the entire baseline examination.
The calibration blocks. examina ti on p roc e du res, and evaluation criteria are s o significantly different between the 1965 Code and later editions, that th,ere is very little correlation between respective examination results.
Accordingly, it is requested that the construction code referenced in Paragraph IWA-3100 (b) be interpreted at Peach Bottom t o mean the 1968 Edition of ASME section III.
This approach will maintain the necessary consistency between the baseline e x a mi r.a t i on s and future ISI examinations to meet the intent of ASME section XI.
It is requested that this relief be considered applicable to all examinations conducted at Peach Bottom under the 1974 Edition of Section XI.
If you have any questions regarding this matter, please contact us.
Very truly yours,
.,.an -
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