ML20084S883

Ro:On 770825,Westinghouse Notified Util of Probable Error in Calculation of Sodium Hydroxide Concentration in Containment Spray Additive Tank.Caused by Procedural Error. Concentration Increased & New Analysis Initiated

ML20084S883
Person / Time
Site:	Robinson
Issue date:	08/26/1977
From:	Mcgirt J, Robinson H CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8306200049
Download: ML20084S883 (2)

Text

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! Caronna Power a ught company-I

%w u e .wam H. B. ROBINSON STEAM RLECTRIC PI. ANT I'ont Of fice Box 790 Hartsvillo, South Carolina 29550 August 26, 1977 l Robinson File No. 2-0-4-a-1 ~ " ' '

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Mr. James P. 0 % illy, Director

' U. S. Nuclear Regulacory Coxif sofon Region II, Suite 1217 230 Peachtree Street, N.W.

Atlanta, Georgia 30303 _ , , , ,

Dr. Ernst Volgenau Director _

U. S. Nuclear Regulatocy Comission Directorate of Regulatory Operations '

Washington, D. C. 20555 Desr Sira:

In accordence followfug reportwith Section 6.9.2 of the plant Technical Specifications is submitted for your information. , the On August 25, 1977 Westinghouse, Inc. notifled the M. B. Robinson staf f of a probable error containment spray in additive the catentation tank. of sodium hydroxide concentration in the Robinson Plant verf fled this fact. A check of the procedure in use at the Although an error in the procedure did occur, the concentration of sodiwa hydroxide vzo tions. deterrnined to be greater than The tank in question was filled in 1970 with the minimum allowedthe by the Technical Spe cifica-as no additions or dilutions have taken place since that time, and proper concentra tion and centration is currently within allowable limits, atoce the con-limiting conditions for operation have been exceeded. it is safe to assume that no t

A system violation from of fulfilling Section its 6.9.2.a.6 requirectents did occur as the condition could hove prevented the .

Technical Specification limit. had the concentration fallen below the The following corrective actions have been taken. ,

1) The sodiura hydroxide ..

higher concentrated solution. tank concentration has been incrc.ased by addition of a 8306200049 770826 . -- -

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Mr. James P. O'Reilly Dr. Ernst Volgenau August 26, 1977 Page 2 2)

A new sodium hydroxide analysis has been inf.tiated which will determine concentration try gravacsetric rather than volumetric taethods.

The Plant Nuclear Safet.y comenittee has reviewed this incident and concurs with the corrective measures.

This was reported by telephone to Mr. Hugh Dance of NRC Region 2 and to Mr H. R. Banks of CPht Cecrpony on August 26, 1977 .

Tours very t ,ly,

! . B. McGirt Manager -

t H. B. Robinson SEC Plant JBM/1d

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