ML19242A788: Difference between revisions

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b      b (,LL E C Ward, PE Manager-Nuclear Environmental Services ECW/jh cc  Director, NRR c/o DSB (17)
b      b (,LL E C Ward, PE Manager-Nuclear Environmental Services ECW/jh cc  Director, NRR c/o DSB (17)
MPCA Attn: J W Ferman                                                        -
MPCA Attn: J W Ferman                                                        -
                                                                                      -
f-b)                                    .s u o u s 7908060 44 7                                        5}}
f-b)                                    .s u o u s 7908060 44 7                                        5}}

Latest revision as of 02:49, 2 February 2020

Submits Environ Event Rept 79-06 Re Cooling Tower Operations for July 1979.Average Daily Blowdown Flow in Excess of 150 Cubic Ft Per Second Was Required for Only Nine Days Because Unit 1 Was Removed from Svc
ML19242A788
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 08/01/1979
From: Ward E
NORTHERN STATES POWER CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 7908060267
Download: ML19242A788 (1)


Text

NORTHERN STATES POWER COMPANY M I N N E A PO LI S. MIN N E SOTA 554O8 August 1, 1979 Mr J G Keppler, Directo , Region III Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr Keppler:

PRAIRIE ISLAND NUCLEAR GENERATING PIAhT Docket No. 50-282 License No. DPR-42 50-306 DPR-60 Environmental Event Report 79-06 Cooling Tser Operations - Julv Under TS B-5.4.2.A, we are furnishing two copies of this Environmental Event Report covering operation of the plant circulating water system in the partial recycle mode with daily average blowdown flow in excess of 150 cfs.

Daily average blowdown flow in excess of 150 cfs was required for only nine days during the month of July mainly because Unit I was removed from service The outage was on July 4 and continued out for the balance of the month.

caused by turbine blading failures. For each of the four days prior to the Unit I shutdown excess flow was necessary and the highest flow of 676 cfs occurred on July 3. Minor excess flows (158-213 cfs) were needed for five days during the outage.

The higher flows were required to maintain cooling water inlet temperatures at 1 css than 85 F.

Yours very truly, c ~-

b b (,LL E C Ward, PE Manager-Nuclear Environmental Services ECW/jh cc Director, NRR c/o DSB (17)

MPCA Attn: J W Ferman -

f-b) .s u o u s 7908060 44 7 5