ML20079L643

Advises That Temporary Change to Chlorine Detection Sys, Made in 1989,not Incorporated Into Subsequent Changes to Updated Sar.Change Made to Alleviate Spurious Actuations of Ventilation Sys.Changes Will Be Included in Next Update

ML20079L643
Person / Time
Site:	Prairie Island
Issue date:	10/28/1991
From:	Parker T NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9111070024
Download: ML20079L643 (2)

Text

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Northem States Power Company i

414 Nico:let Mall l

Minneapohs, Minnesota $5401 192.

Telephone (612) 330-5b00 i

I October 26, 1991 10 CF3 Part 50 l

Section 50,71(c) 1 i

Q U S Nuclear Regulatory Ccumission 4

Attn:

Document Control Desk

]

Washington, DC 20555 i

3 4

PRAIRIE ISLAAD NUCLEAR GENERATINC PLANT l

Docket Nos, 50 282 License Nos. DPR-42 50-306 DPR-60 1

Plant Change Not included in the Annual Update to the Updated Safety Analysis Report

Reference:

Letter from C E Larson, Vice President, Northern States Power Company, to W L Axelson, Chief, Projects Branch 2, Region Ill, U S Nuclear Regulatory Commission dated October 5, 1989 titled

" Plans for Increasing the Reliability of Chlorine Detection in the Control Room Ventilation System,"

In 1989, a temporary change to the chlorine detection system was made.

A description of this change has not been ir.corporated into subsequent changes to the Updated safety Analysis Report. The next change to the Updated Safety Analysis Report will include a description of this change.

The ehange was made in the control roam chlorine detection system to alleviate

. spurious actur.tions of the safeguards control room special ventilation system, We had made a commitment to NRC Region III to make thic change (Reference).

The change was intended as a temporary change until a permanent solution could be implemented.

Since the change was considered temporary we chose not to include it in a revision to the Updated Safety Analysis Report.

Iloweve r,

since the change har been in place since December 19P9, it is appropriate to change the Updated Safety Analysis Report.

If the permanent modification is completed prior to,the next revisiot. of the Updated Safety Analysis Report, the page changes to the Updated Safety Analysis Report will reflect that configuration only. We will include a This description of the temporary change and a summary safety evaluation.

will be incorporated into the exhibit which contains a description and summary of the safety evaluations for the changes, t(sts and experiments made undar the provisions of 10 CFR Part 50, Section 50.59.

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9111070024 91102a PDR ADOCK 05000282 P

PDR m

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o Northem States Power Company Please contact us if you require additional infortnation,

$$1N4 u

Thomac M Parker Manager Nuclear Support Services s

c: Regional Admlaistrator Region III, NRC Senior Res dent inspector, NRC NRR Project Manager, NBC J E Silberg 1

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