Exceeding limit

Mandatory Action Points and Never Exceed Limits Have Two Purposes ... 

For key operating variables, post, train, and drill the responses for Critical Safety Operating Parameters. If the process variable approaches the Mandatory Action level, the operator should take the Never Deviate corrective action (see Figure 6.3). Supervision should never criticize taking the Never Deviate action to avoid the Never Exceed limit. 

Critical Safe Operating Parameters Never Deviate actions prevent reaching the Never Exceed limit. 

Figure 6.i. Op>eratiug ranges, ittustrating Never Exceed limits. 

Fig. 8.3. Relationships between critical limits xCl and analytical results x a the critical limit is significantly exceeded b the result falls significantly below the limit value c given critical exceeding limit xEL = k xCE...

Dowell, A.M. 2001. "Critical Safe Operating Parameters Never Exceed Limit and Never Deviate Action." Process Safety Progress 20(3). September. 

Historically, the intervention of tunneling has usually been invoked when the observed KIE exceeded limits set by semi-classical theory. A recent example is the hydrogen atom transfer step in methylmalonyl-CoA mutase (MCM) catalyzed... 

Because microbiological test results from a water system are not usually obtained until after the dmg product is manufactured, results exceeding limits shall be reviewed with regard to the drug product formulated from such water. Consideration with regard to the further processing or release of such a product will depend upon the specific contaminant, the process, and the end use of the product. Such situations are usually evaluated on a case-by-case basis. 

The selection of random engine modes during type approval emission testing, and ensuring that emission limits are not exceeded (the not-to-exceed limit approach). 

A control system designed to automatically change the operating conditions such that the COP is no longer outside the Never-Exceed-Limit (N-E-L). The system may shutdown the operation or it may change conditions such that operation continues in a different mode. The Safety Interlock System must be independent from the normal control system to avoid "common mode" failure where one failure defeats both the normal control system and the Safety Interlock System. 

Any process alarm that is associated with a critical instrument. This includes process alarms indicating an approach to a COP never-exceed-limit as identified in SOP s. 

Following is a list of some possible parameters for which never-exceed-limits could be established ... 

Never-exceed-limits for critical operating parameters are never to be intentionally exceeded unless a formal review is conducted and all safety concerns are addressed. This occurrence would trigger a Management of Change (See Section 13.)... 

The immediate actions required when the Never-Exceed-Limit is reached (These actions must be clearly defined, easily implemented, and must not require that personnel enter an area of potentially high risk.)... 

Mandatory Actions on Reaching a "Never Exceed" Limit WK WK WK u WK... 

HAZARD, CONSEQUENCES OF VIOLATING THE "NEVER EXCEED" LIMIT ... 

High-hazard waste Any nonexempt waste that generally requires disposal system more isolating than dedicated near-surface facility for hazardous wastes1 Concentrations of any hazardous substances that exceed limits for low-hazard waste... 

For comparison purposes, the spectrum of LaV04 (excited at 330 nm) is given in Fig. 15. The spectra for steam aged LaY crystals containing low (1.29%) V levels is shown in Fig. 16. Luminescent lifetime data are given in Tables I and II. In all cases there are two components, (Tt and a T2), present. The T2 species are very short often exceeding limits of detection. 

Any sampling performed. Details should be provided as to how much sample to take, how to take or handle the sample (e.g., refrigerate), what test(s) are to be performed on the sample, the specifications for those tests, and what to do if the test results exceed limits. 

Subarea code the water table (m3) exceeding limits (m3) % exceeding limits (m3) %... 

Ionization degree increases with temperature rise. When some limiting amount of a substance dissolved in solution is exceeded (limiting supersaturation), its spontaneous crystallization starts. This process can be governed by changing of the temperature (and pressure, correspondingly) as it is carried out in a closed vessel. 

Name/Location Description Never Exceed Interlocks Alarms Operating Range Remarks R—Reason for Limit or Effect of Exceeding Limit C—Correction and/or Control Action T—Troubleshooting Guide... 

Where "NEVER EXCEED" limits are applicable, any deviation outside these limits will require a document incident investigation. ... 

The feed system contained an integrated balance to quantify mass flow rate, multiple pressurized feed containers to supply material to the process, a stream select valve to choose which feed container supplied material, and a feed pump to transfer the material from the feed container through the reactor. Syringe pumps provided accurate and stable flow rates, ranging from a few pL min to over 1 mL min , at pressures as high as 1000 psi. These flow rate and pressure capabilities exceed limitations imposed by other system components. 

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