ML20132G022

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Notifies That Three of Five Unmortared Stacked Block Walls Will Not Be Mortared in Place by 850802,per 850301 Commitment,Due to High Radiation Levels Near Fuel Storage Well.Completion Anticipated by 851231
ML20132G022
Person / Time
Site: Fort Saint Vrain Xcel Energy icon.png
Issue date: 07/16/1985
From: Warembourg D
PUBLIC SERVICE CO. OF COLORADO
To: Johnson E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
P-85234, TAC-42925, NUDOCS 8508020474
Download: ML20132G022 (2)


Text

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p h PublicService 2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 conwny of colorado July 16, 1985 Fort St. Vrain Unit No. 1 P-85234 Regional Administrator D Region IV U. S. Nuclear Regulatory Comission

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Attn: Mr. E. H. Johnson Docket No. 50-267

SUBJECT:

Masonry Block Walls

REFERENCES:

PSC Letter to Johnson from Lee dtd March 1, 1985 (P-85069)

Telecon between PSC and NRC on June 27, 1985

Dear Mr. Johnson:

In Attachment 2 of the above referenced letter, PSC comitted to mortar in place five previously unmortared stacked block walls by August 2, 1985. Three of these walls serve as closures for access penetrations through reinforced concrete walls into fuel storage well compartments. A majority of the storage wells currently contain spent fuel blocks, and high radiation levels have been encountered at these wall locations during attempted construction activities.

In keeping with our policy of maintaining individual exposure levels as low as reasonably achievable, we will be unable to complete work on these three walls by August 2, 1985 as previously stated. Pending no change in spent fuel shipping schedules, PSC anticipates completing work on these three walls by December 31, 1985.

As requested by the NRC during the telephone conversation between PSC and NRC on June 27, 1985, PSC would like to clarify that all of the wall modifications addressed in Attachment 2 of the above referenced letter are designed to meet the Structural and Geotechnical h7-[7/

8508020474 850716 PDR ADOCK 05000267 [00 P PDR ggd O l

6 Engineering Branch (SGEB) criteria. Additionally, we would like to document that the safety related masonry walls located in Building 10 have been conservatively analyzed as unreinforced masonry walls, although in reality the walls are constructed of reinforced masonry.

The results of these analyses show that the Building 10 walls, when considered unreinforced, will meet the SGEB Criteria. The reinforcing steel in the walls provides for additional conservatism in the design.

Should you have any questions, please contact Mr. M. H. Holmes at (303) 571-8409.

Very truly yours, b fY fuu &

D. W. Wareabourg, Mahager Nuclear Engineering Division l

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