Nasa expendable launch vehicle payload safety requirements: requirements table



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chart (2)

Figure 3.2: Acceptability Guidelines for Prelaunch Launch Area/Launch Complex Hazard Consequences and Probability Categories




*Probability refers to the probability that the potential consequence will occur in the life cycle of the system (test/activity/operation).

Use the following list to determine the appropriate Risk Level.







DESCRIPTION**


THRESHOLD LEVEL


PROBABILITY VALUE


SPECIFIC INDIVIDUAL ITEM


FLEET OR INVENTORY***



A

Frequent




3X10-1

Likely to occur repeatedly

Continuously experienced

-----------------------

8X10-2

-----------------------------------------------------------------------------------------------------------------------------

B

Reasonably probable




3X10-2

Likely to occur several times

Will occur frequently

-----------------------

8X10-3

-----------------------------------------------------------------------------------------------------------------------------

C

Occasional




3X10-3

Likely to occur sometime

Will occur several times

-----------------------

8X10-4

-----------------------------------------------------------------------------------------------------------------------------

D

Remote




3X10-4

Unlikely to occur, but possible

Unlikely, but can reasonably be expected to occur




-----------------------

8X10-5

-----------------------------------------------------------------------------------------------------------------------------

E

Extremely Improbable




3X10-5

The probability of occurrence cannot be distinguished from zero.

Unlikely to occur, but possible

** Definitions of descriptive words may have to be modified based on quantity involved.



*** The size of the fleet or inventory and system life cycle should be defined.



Figure 3.2 (Continued): Acceptability Guidelines for Prelaunch Launch Area/Launch Complex Hazard Consequences and Probability Categories




3.3.7. Range Safety shall evaluate all launch vehicle, payload, ground support, and facility systems used on the ranges to test, checkout, assemble, handle, support, or launch space launch vehicles or payloads with regard to their hazard potential and ensure they are designed to minimize risks to personnel and fall within acceptable exposure levels for launch area and launch complex safety.

C




Launch Complex Safety


The following requirements are in addition to those also specifically identified for launch complex safety in 3.2.1 and 3.3 of this volume.

I





3.4.4. When hazards extend to range assets or the general public, the SW Commander has the ultimate responsibility to ensure proper safety through an appropriate level of oversight into payload project operations.

I






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