ML20204G614: Difference between revisions

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7 10 JUL W          y Docket Nos.:      50-498 and 50-499 Mr. J. H. Goldberg Group Vice President - Nuclear Houston lighting and Power Company Post Office Box 1700 Houston, Texas 77001
 
==Dear Mr. Goldberg:==
 
==SUBJECT:==
SOUTH TEXAS PROJECT UNITS 1 AND 2, ALTERNATIVE PIPE BREAK CRITERIA In letters from you dated March 12, 1986 and June 10, 1986, we received the technical basis for elimination of postulated pipe ruptures in the pressurizer surge line and in the high energy lines for auxiliary and balance of plant piping, respectively. In the {{letter dated|date=March 12, 1986|text=March 12, 1986 letter}} you requested an exemption to the requirements of 10 CFR 50, Appendix A, General Design Criteria-4 for the treatment of pressurizer surge line pipe breaks. We have reviewed the information in the {{letter dated|date=March 12, 1986|text=March 12, 1986 letter}} and have prepared a request for additional information, which is contained in the attachment to this letter.
Similar information will be required for piping in the high energy lines for auxiliary and balance of plant piping.
In addition we request that the vendor, Westinghouse Electric Corporation, grant us permission to release system parameters, margin numbers, specific system moments and forces, references to analytical methods, leak rates and reference crack sizes, which have been designated as proprietary. This information must be included in the staff's safety evaluation supporting the published conclusions.
After the vendor has received and reviewed our request for additional information, we request a meeting between the staff and your technical personnel to facilitate our review.
h N. Prasa Kadambi, Project Manager PWR Project Directorate #5 Division of PWR licensing-A
 
==Enclosure:==
As stated cc:    V. S. Noonan E. J. Sullivan, Jr.
Distribution Docket Files                E. Jordan NRC PDR                    B. Grimes local PDR                  P. Kadambi PD#5 R/F                    M. Rushbrook J. Partlow                  OELD ACRS (10)                  T. Novak PD#5 PKadambi            8608070341 860710 PDR ADOCK 0500        8 7/(f)/86}}

Latest revision as of 05:06, 7 December 2021

Forwards Request for Addl Info to Prepare Response to 860312 Request for Exemption to 10CFR50,App A,Gdc 4 Requirements Re Treatment of Pressurizer Surge Line Pipe Breaks
ML20204G614
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 07/10/1986
From: Kadambi N
Office of Nuclear Reactor Regulation
To: Goldberg J
HOUSTON LIGHTING & POWER CO.
References
NUDOCS 8608070341
Download: ML20204G614 (1)


Text

r' - -

7 10 JUL W y Docket Nos.: 50-498 and 50-499 Mr. J. H. Goldberg Group Vice President - Nuclear Houston lighting and Power Company Post Office Box 1700 Houston, Texas 77001

Dear Mr. Goldberg:

SUBJECT:

SOUTH TEXAS PROJECT UNITS 1 AND 2, ALTERNATIVE PIPE BREAK CRITERIA In letters from you dated March 12, 1986 and June 10, 1986, we received the technical basis for elimination of postulated pipe ruptures in the pressurizer surge line and in the high energy lines for auxiliary and balance of plant piping, respectively. In the March 12, 1986 letter you requested an exemption to the requirements of 10 CFR 50, Appendix A, General Design Criteria-4 for the treatment of pressurizer surge line pipe breaks. We have reviewed the information in the March 12, 1986 letter and have prepared a request for additional information, which is contained in the attachment to this letter.

Similar information will be required for piping in the high energy lines for auxiliary and balance of plant piping.

In addition we request that the vendor, Westinghouse Electric Corporation, grant us permission to release system parameters, margin numbers, specific system moments and forces, references to analytical methods, leak rates and reference crack sizes, which have been designated as proprietary. This information must be included in the staff's safety evaluation supporting the published conclusions.

After the vendor has received and reviewed our request for additional information, we request a meeting between the staff and your technical personnel to facilitate our review.

h N. Prasa Kadambi, Project Manager PWR Project Directorate #5 Division of PWR licensing-A

Enclosure:

As stated cc: V. S. Noonan E. J. Sullivan, Jr.

Distribution Docket Files E. Jordan NRC PDR B. Grimes local PDR P. Kadambi PD#5 R/F M. Rushbrook J. Partlow OELD ACRS (10) T. Novak PD#5 PKadambi 8608070341 860710 PDR ADOCK 0500 8 7/(f)/86