ML20091A914

Requests Rev to SER Eliminating Tech Spec Requirement Re Collet Retainer Tube in CRD Sys

ML20091A914
Person / Time
Site:	Fermi
Issue date:	05/23/1984
From:	Jens W DETROIT EDISON CO.
To:	Youngblood B Office of Nuclear Reactor Regulation
References
EF2-68-289, NUDOCS 8405300127
Download: ML20091A914 (2)

Text

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Wiyne H. JIn3 Vce Presglent Nuclear Operatens Deholt Edison =2000 Second Avenuew-May 23, 1984 EF2-68,289 Director of Nuclear Reactor Regulation Attention: Mr. B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing U. S. Nuclear Regulatory Ccrxaission Washington, D. C. 20555

Reference:

(1)

Fermi-2 NRC Docket No. 50-341

Subject:

Request to Modify SER Statment Concerning Collet Retainer Tube Section 4.5.1 of the Fermi-2 SER discusses the design and inspection requirements for the collet retainer tube in the CRD system. This section states in part "the augmented testing program rrvvmmnded by the General Electric Ccmpany will be carried out."

The section also indicates that NRC staff would include the " augmented testing program" as a requircment in Fermi's technical specifications.

We believe that the phrase " augmented testing program" refers to Edison's response to question 212.155 (Appendix E.5 of the FSAR) in which Edison described a program consisting of three parts.

One of the parts was characterized as "an augmented surveillance and inspection program" which consists of the following actions:

1.

Each rod not fully inserted will be tested by insert-ing one or more notches at least weekly to confirm operability.

2.

All CRDs rmoved for maintenance will have a dye pene-trant examination made of the outer surface of the collet retainer tube (CRT). The criteria established by General Electric in Service Information Letter (SIL) 139 will be used to decide rejection. The term CRT refers to a portion of the outer tube, and replaccment of a rejected CRT requires a new cylinder, tube, and flange subassembly.

Surveillance 4.1.3.1.5 in the Fermi-2 technical specifications currently includes the requirment to perform the dye penetrant exam.

8405300127 B40523 DRADOCK05000g i O m

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Mr. B. J. Youngblood EF2-68,289

. Page 2 Since the other two parts of Fermi-2's respense to the GT issue eliminate unnecessary thermal cycling and provide a source of water with very low oxygen content to the GD system we have determined that the probability of cracking has been made ex-treely rmote. In view of this and the fact that the dye penetrant examination is not included in the GE Standard Tech-nical Specifications nor any other BWR's technical specifications, we request the staff to revise the SER to elhninate this as a technical specification requirment. It will continue to be a cmmitment, however, and is included in the Fermi-2 maintenance procedures.

Please coordinate the review of this request with Mr. Don Hoffman of your staff to support the Proof and Review process. Should you have any questions, please contact Mr. Keener Earle (313) 586-4211.

Sincerely, cc: Mr. P. Byron h

Mr. M. D. Lynch Mr. D. Hoffman