ML20129H251

Forwards Page 120 of 850122 Proposed Finding of Fact & Conclusions of Law on Safety Issues,Inadvertently Omitted from ASLB Copies.Page Also Served Upon All Parties to Proceeding

ML20129H251
Person / Time
Site:	Harris
Issue date:	06/05/1985
From:	Johari Moore NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD)
To:	Bright G, Carpenter J, Kelley J Atomic Safety and Licensing Board Panel
References
CON-#285-308 OL, NUDOCS 8506070528
Download: ML20129H251 (2)

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ma uro 0,, UNITED STATES s

., p, NUCLEAR REGULATORY COMMISSION l

.g 8 WASHINGTON, D. C. 20655 l

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June 5, 1985 00CKETED' James L. Kelley, Chainnan -

. Mr. Glenn 0. Bright USNRC

. Administrative Judge Administrative Judge Atomic Safety and Licensing Board Atomic Safety and Licensing B4Fd U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory CommiWlonAlN-6 #1:57 Washington, DC 20555 Washington, DC 20555 CFF/CE 0~ SECRETAps GCC6ETING & SERVIr,1' Dr. James H. Carpenter BRANCH A kinistrative Judge

' Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Washington, DC 20555 T

In the Matter of Carolina Power and Light Company and North Carolina Eastern Municipal Power Agency (Shearon Harris Nuclear Power Plant, Units 1 and 2)

Docket Nos. 50-400 and 50-401oL-

Dear Administrative Judges:

Pursuant to your request I am enclosing three copies of page 120 of  ;

the Staff's Proposed Findings of Fact and Conclusions of Law on Safety Issues, filed on January 22, 1985. This page was inadvertently omitted

from the Board's copies. The page is also being served upon all parties to the proceeding in case other copies are also incomplete. I apologize

, for any inconvenience this omission has caused.

Sincer.ely, L

8506070528 8 PDR ADOCK O O d b b k Ml.VDd.

• e P Janice E. Moore Counsel for NRC Staff Enc'losure: - As stated cc w/ encl.: Service List-gO

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- 120 -

y known to be sensitive to moisture effects as was the polyurethane used in l

the Sandia report. _ (Miller /Dakin, ff. Tr. 4839 at 14-15.)

374. Even the Sandia report concludes that " accelerated aging techniques offer the best opportunity for predicting lifetimes or simulating life of complex equipoent." (Miller /Dakin, ff. Tr. 4839 at 15; Masciantonio,

! ff. Tr. 5567 at 14.) ,

375. During cross-examination concerning the properties of epoxies, Applicants' witness t:stified that epoxy starts as an organic compound, reacts with catalyrts and Scomes a high polymer. Epoxies have better aging characteristics than other resins except for silicone. They are strong mechanically. -(Dakin,Tr.4912.) Dr. Dakin did testify that they 4

. can have shrinking, cracking and evaporation these are the methods for degradation of such epoxies. (Jd_. ) These mechanisms are caused by C, cross-linking and by oxidation. (Dakin,Tr. 4912-4913.)

376. Dr. Dakin testified that if the epoxy has a filler the moisture can be absorbed onto the filler and the resistivity would decline with time to a sufficient degree to cause a change in the calibration of the RTDs. However, Dr. Dakin believes that the effects would be small and doubts that it would be important. (Dakin,Tr.4916.) He thinks that the main effect'would be on the filler. (Id. at Tr. 4917.) Dr. Dakin points out that the polyurethanes mentioned in the Sandia report were a different I

material to that used at Harris. (Jd. ) In addition, the RTDs are sealed j and therefore would provide an additional barrier to moisture intrusion.

(Dakin Tr. 4910.) Dr. Dakin does not believe that moisture diffusion would be a problem in the case of the RTDs. (Dakin,Tr.4920.)

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