ML19317G088

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AO-75-08:on 750429,error Discovered in Positive Imbalance Portion of Trip Envelope Resulting in Nonconservative Setpoints.Caused by Misreading of Offset Versus Power Limits by Personnel
ML19317G088
Person / Time
Site: Rancho Seco
Issue date: 05/07/1975
From: Mccolligan J
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19317G075 List:
References
NUDOCS 8002210779
Download: ML19317G088 (1)


Text

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[0 l 4 l 2l 9l 7l 5l l0l5l0l7l7l5l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCR;PTION HE I An error was discovered in the positive imbalance portion of the trip envelope as l

7 89 80 g-l defined by Technical Specifications Section 2.3 for flux / imbalance / flow, resulting l

_ 7 89 80 Q l in non-concentrative setpoints. Conservative interim setpoints were then inserted l

7 89 80 HE l In the RPS pendinn formal receipt o'f final setpoints. (AO-75-8) l 7 89 80 E I l

7 89 Pauf 80 EE M AC COOF COMPONENT CODE S

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lN l lB l0 l4 l5 l lyl 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION g

DE I One point of the "of fset versus power" limits was misread during conversion of),the l

7 89 80 g l" core axial offset" to "corc. axial imbalance".

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l FACiUTY METHOO OF

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STATUS

% POWEA CTHER STATUS OSCOVERY OISCOVEAY DESCRPTION (Ej l0 l 9l 2l lNA l

lDl l Notified by NSS Vendor l

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10 12 13 44 45 46 80 Adi TV CDsTENT phEl.SEO OF CELEASE l NA l

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7 89 10 80 PUGUC!TY

@ l' Snernmento " Bee" and " Union" notified Mnv 1,1975 l ;'

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ADD 11 TONAL FACTORS

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~ 7 80 00 NAME: John V. McCo11 iran PHONE: (916) 452-3211

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