ML20027D160

From kanterella
Jump to navigation Jump to search
Comments on Summary of CRGR Meeting 21 on 821006 Re Proposed Screening Criteria for Vessel Ref Temp Ndt.Figure Provides Longitudinal Crack Extension Frequencies for Mean Surface Rather than Computed Mean Plus 2 Sigma
ML20027D160
Person / Time
Issue date: 10/26/1982
From: Scinto J
NRC
To: Stello V
NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO)
Shared Package
ML20027D161 List:
References
NUDOCS 8210280348
Download: ML20027D160 (1)


Text

k I

j(

UNITED STATES 8

NUCLEAR REGULATORY COMMISSION o

WASHINGTO N, D. C. 20555 5

.p

\\

/

October 26, 1982 MEMORANDUM FOR: Victor Stello, Jr.

FROM:

Joseph F. Scinto

SUBJECT:

COMMENTS ON MINUTES OF CRGR MEETING NUMBER 21 On page 1 of the Minutes, dated October 20, 1982, I would note that the way in which RTNDT for the screening criterion is to be computed (by including a 2 sigma value to the mean values, p.5-5 of the draft) makes the 270"F screening criterion more protective than figure 8.3 in the draft report might suggest. That figure provides longitudinal crack extension frequencies for mean surface RTNDT, rather than for RTNDT computed as mean plus 2 sigma.

m

-<2 Q ph F. Scint cc:

R. Bernero Ed Jordan R. Cunningham C. Heltemes D. Eisenhut i

0C 8210280348 821026 PDR REVGP NRCCRGR PDR

.